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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
(Mark One)
☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2023
OR 
☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from ____ to ____  
Commission File Number 001-33351
_________________________________________________ 
 NEUROMETRIX, INC.
(Exact name of registrant as specified in its charter)
Delaware04-3308180
(State or other jurisdiction of(I.R.S. Employer Identification No.)
incorporation or organization) 
  
4B Gill Street Woburn, Massachusetts
01801
(Address of principal executive offices)(Zip Code)
(781) 890-9989
(Registrant’s telephone number, including area code) 
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)Name of exchange on which registered
Common Stock, $0.0001 par value per shareNUROThe Nasdaq Stock Market LLC
Preferred Stock Purchase Rights
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
Yes x     No ¨
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).
Yes x     No ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definition of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act:
Large accelerated filer Accelerated filer Non-accelerated filer Smaller reporting companyEmerging growth company
☐☐
☒
☒
☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).
Yes ☐     No x
Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date: 8,591,374 shares of common stock, par value $0.0001 per share, were outstanding as of October 25, 2023.





NeuroMetrix, Inc.
Form 10-Q
Quarterly Period Ended September 30, 2023
 
TABLE OF CONTENTS
 
 
   
Item 1. 
   
 Balance Sheets as of September 30, 2023 (unaudited) and December 31, 2022
   
 Statements of Operations (unaudited) for the Quarters and Nine Months Ended September 30, 2023 and 2022
Statements of Comprehensive Loss (unaudited) for the Quarters and Nine Months Ended September 30, 2023 and 20222
   
Statements of Changes in Stockholders' Equity (unaudited) for the Quarters and Nine Months Ended September 30, 2023 and 2022
 Statements of Cash Flows (unaudited) for the Nine Months Ended September 30, 2023 and 20224
   
 
   
Item 2.11
   
Item 3.17
   
Item 4.18
   
 
   
Item 1.19
   
Item 1A.19
   
Item 2.20
   
Item 3.20
   
Item 4.20
   
Item 5.20
   
Item 6.21
   
22

3



PART I – FINANCIAL INFORMATION
 
Item 1. Financial Statements
 
NeuroMetrix, Inc.
Balance Sheets
 
 September 30, 2023December 31, 2022
(Unaudited)
Assets  
Current assets:  
Cash and cash equivalents
$1,460,553 $4,335,020 
Held-to-maturity securities— 16,864,707 
Available-for-sale securities16,177,122 — 
Accounts receivable, net
614,381 646,771 
Inventories
1,666,609 1,614,987 
Prepaid expenses and other current assets
786,978 645,502 
Total current assets
20,705,643 24,106,987 
Fixed assets, net272,838 165,619 
Right of use asset281,891 370,609 
Other long-term assets26,400 26,400 
Total assets
$21,286,772 $24,669,615 
Liabilities and Stockholders’ Equity  
Current liabilities:  
Accounts payable
$225,474 $368,082 
Accrued expenses and compensation
886,501 589,939 
Lease obligation, current
148,391 148,391 
Total current liabilities
1,260,366 1,106,412 
Lease obligation, net of current portion
122,870 207,516 
Total liabilities
1,383,236 1,313,928 
Commitments and contingencies
Stockholders’ equity:  
Preferred stock
— — 
Convertible preferred stock
1 1 
Common stock, $0.0001 par value; 25,000,000 shares authorized at September 30, 2023 and December 31, 2022; 8,588,455 and 7,771,938 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively
859 777 
Additional paid-in capital
228,155,613 226,934,775 
Accumulated other comprehensive income206,869 — 
Accumulated deficit
(208,459,806)(203,579,866)
Total stockholders’ equity
19,903,536 23,355,687 
Total liabilities and stockholders’ equity
$21,286,772 $24,669,615 

The accompanying notes are an integral part of these interim financial statements.
1



NeuroMetrix, Inc.
Statements of Operations
(Unaudited)
 
 Quarters Ended September 30,Nine Months Ended September 30,
 2023202220232022
Revenues$1,203,164 $1,968,003 $4,583,679 $6,408,695 
Cost of revenues421,382 693,571 1,484,240 1,888,566 
Gross profit
781,782 1,274,432 3,099,439 4,520,129 
Operating expenses:    
Research and development
592,654 1,074,954 2,045,588 2,701,330 
Sales and marketing
943,795 810,209 2,504,630 2,235,646 
General and administrative
1,206,231 1,102,260 3,843,643 3,468,452 
Total operating expenses
2,742,680 2,987,423 8,393,861 8,405,428 
Loss from operations
(1,960,898)(1,712,991)(5,294,422)(3,885,299)
Interest income 25,378 106,737 247,699 160,560 
Other income 166,783 — 166,783 — 
Net loss$(1,768,737)$(1,606,254)$(4,879,940)$(3,724,739)
Net loss per common share applicable to common stockholders, basic and diluted$(0.21)$(0.23)$(0.61)$(0.53)
 


Statements of Comprehensive Loss
(Unaudited)

 Quarters Ended September 30,Nine Months Ended September 30,
 2023202220232022
Net loss $(1,768,737)$(1,606,254)$(4,879,940)$(3,724,739)
Other comprehensive income:
Unrealized gain on available-for-sale securities204,931 — 373,652 — 
Reclassification of realized gain on available-for-sale securities to other income(166,783)— (166,783)— 
Comprehensive loss$(1,730,589)$(1,606,254)$(4,673,071)$(3,724,739)

The accompanying notes are an integral part of these interim financial statements.
2



NeuroMetrix, Inc.
Statements of Changes in Stockholders' Equity
(Unaudited)
Series B Convertible Preferred StockCommon
Stock		Additional
Paid-In
Capital		Accumulated
Deficit		Total
Number of
Shares		AmountNumber of
Shares		AmountAccumulated Other Comprehensive Income
Balance at December 31, 2022200 1 7,675,682 $777 $226,934,775 $— $(203,579,866)$23,355,687 
Stock-based compensation expense— — — — 165,361 — — 165,361 
Vesting of restricted stock under equity plan— — 19,512 1 (1)— — — 
Unrealized gain on available-for-sale securities— — — — — 65,874 — 65,874 
Net loss — — — — — — (1,574,174)(1,574,174)
Balance at March 31, 2023200 1 7,695,194 778 227,100,135 65,874 (205,154,040)22,012,748 
Stock-based compensation expense— — — — 132,745 — — 132,745 
Issuance of common stock under at the market offering— — 725,291 73 691,332 — — 691,405 
Issuance of common stock under employee stock purchase plan— — 10,526 1 8,714 — — 8,715 
Vesting of restricted stock under equity plan— — 72,121 6 (6)— — — 
Unrealized gain on available-for-sale securities— — — — — 102,847 — 102,847 
Net loss— — — — — — (1,537,029)(1,537,029)
Balance at June 30, 2023200 1 8,503,132 858 227,932,920 168,721 (206,691,069)21,411,431 
Stock-based compensation expense— — — — 221,268 — — 221,268 
Issuance of common stock under at the market offering— — 1,470 — 1,426 — — 1,426 
Vesting of restricted stock under equity plan— — 22,561 1 (1)— — — 
Unrealized gain on available-for-sale securities— — — — — 204,931 — 204,931 
Realized gain on available-for-sale securities— — — — — (166,783)— (166,783)
Net loss— — — — — — (1,768,737)(1,768,737)
Balance at September 30, 2023200 1 8,527,163 859 228,155,613 206,869 (208,459,806)19,903,536 
Series B Convertible Preferred StockCommon
Stock		Additional
Paid-In
Capital		Accumulated Other Comprehensive IncomeAccumulated
Deficit		Total
Number of
Shares		AmountNumber of
Shares		Amount
Balance at December 31, 2021200 $1 6,650,480 $668 $222,378,374 $— $(199,163,257)$23,215,786 
Stock-based compensation expense— — — — 37,632 — — 37,632 
Issuance of common stock under at the market offering — — 292,500 29 1,943,023 — — 1,943,052 
Vesting of restricted stock under equity plan — — 1,759 3 (3)— — — 
Net loss — — — — — — (958,562)(958,562)
Balance at March 31, 2022200 1 6,944,739 700 224,359,026 — (200,121,819)24,237,908 
Stock-based compensation expense— — — — 109,340 — — 109,340 
Issuance of common stock under employee stock purchase plan— — 2,503 — 7,829 — — 7,829 
Issuance of common stock to settle compensation obligation— — 50,213 5 215,412 — — 215,417 
Vesting of restricted stock under equity plan— — 3,120 7 (7)— — — 
Net loss— — — — — — (1,159,923)(1,159,923)
Balance at June 30, 2022200 1 7,000,575 $712 224,691,600 — (201,281,742)23,410,571 
Stock-based compensation expense— — — — 161,951 — — 161,951 
Vesting of restricted stock under equity plan — — 16,578 1 (1)— — — 
Net loss — — — — — — (1,606,254)(1,606,254)
Balance at September 30, 2022200 $1 7,017,153 $713 $224,853,550 $— $(202,887,996)$21,966,268 
The accompanying notes are an integral part of these interim financial statements.
3




NeuroMetrix, Inc.
Statements of Cash Flows
(Unaudited)
 Nine Months Ended September 30,
 20232022
Cash flows from operating activities:  
Net loss$(4,879,940)$(3,724,739)
Adjustments to reconcile net loss to net cash used in operating activities:
  
Depreciation
30,957 39,170 
Stock-based compensation
519,374 308,923 
Issuance of common stock to settle compensation obligations— 26,019 
Inventory provision charged to cost of revenue63,420 — 
Loss on disposal of fixed assets— 6875 
Amortization of premiums and discounts on securities (135,293)(133,278)
Realized gain on available-for-sale securities(166,783)— 
Changes in operating assets and liabilities:  
Accounts receivable32,390 (391,641)
Inventories(115,042)(350,686)
Prepaid expenses and other current and long-term assets(197,404)(383,310)
Accounts payable(142,608)255,343 
Accrued expenses and compensation356,562 540,902 
Net cash used in operating activities(4,634,367)(3,806,422)
Cash flows from investing activities:  
Purchases of held-to-maturity securities— (18,921,376)
Purchases of available-for-sale securities (22,898,470)— 
Proceeds from maturities of held-to-maturity securities17,000,000 — 
Proceeds from maturities of available-for-sale securities7,095,000 — 
Purchases of fixed assets(138,176)(23,182)
Net cash used in investing activities1,058,354 (18,944,558)
Cash flows from financing activities:  
Net proceeds from issuance of stock 701,546 1,950,881 
Net cash provided by financing activities701,546 1,950,881 
Net decrease in cash and cash equivalents(2,874,467)(20,800,099)
Cash and cash equivalents, beginning of period4,335,020 22,572,104 
Cash and cash equivalents, end of period$1,460,553 $1,772,005 
 
The accompanying notes are an integral part of these interim financial statements.
 
4

NeuroMetrix, Inc.
Notes to Unaudited Financial Statements
September 30, 2023



1.Business and Basis of Presentation

Our Business-An Overview
 
NeuroMetrix, Inc. (the "Company" or "NeuroMetrix") develops and commercializes health care products that utilize non-invasive neurostimulation. Revenues are derived from the sale of medical devices and after-market consumable products and accessories. The Company’s products are sold in the United States and select overseas markets. They are cleared by the U.S. Food and Drug Administration ("FDA") and regulators in foreign jurisdictions where appropriate. The Company has two primary products. DPNCheck® is a point-of-care test for diabetic peripheral neuropathy, which is the most common long-term complication of Type 2 diabetes. Quell is an app-enabled, wearable device for lower extremity chronic pain and for the symptoms of fibromyalgia.

The Company held cash, cash equivalents and securities totaling $17.6 million as of September 30, 2023. The Company believes that its present balance of cash resources and securities coupled with cash inflows from product sales will enable the Company to fund its operations for at least the next twelve months from the date of issuance of the financial statements. Actual cash requirements could differ from management's projections for many reasons, including changes the Company may make to its business strategy, commercial challenges, regulatory developments, changes to research and development programs, supply chain issues, staffing challenges and other items affecting the Company's projected uses of cash.

Unaudited Interim Financial Statements
 
The accompanying unaudited financial statements as of September 30, 2023 have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. The accompanying balance sheet as of December 31, 2022 has been derived from the audited balance sheet as of December 31, 2022 included in the Company's Form 10-K referenced below and does not include all disclosures required by GAAP. In the opinion of management, the financial statements include all normal and recurring adjustments considered necessary for a fair presentation of the Company’s financial position and operating results. Operating results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023 or any other period. These financial statements and notes should be read in conjunction with the financial statements for the year ended December 31, 2022 included in the Company’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission, (the "SEC"), on March 22, 2023 (File No. 001-33351).

Prior period reclassifications

We classify money market funds within cash and cash equivalents. Money market funds in the amount of $81,751 which were reported within held-to-maturity ("HTM") securities at December 31, 2022 have been reclassified into cash and cash equivalents to conform with the current presentation.
 
Revenues

Revenues include product sales, net of estimated returns. Revenue is measured as the amount of consideration the Company expects to receive in exchange for product transferred. Revenue is recognized at the point in time when contractual performance obligations have been satisfied and control of the product has been transferred to the customer. The Company typically has a single product delivery performance obligation. Accrued product returns using the most likely amount method are estimated based on historical data and evaluation of current information and variable consideration is not constrained.

Accounts receivable are recorded at the amount the Company expects to collect, net of the allowance for doubtful accounts receivable. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses based on customer past payment history, product usage activity, recent customer communications and, if appropriate, assessment of the future credit losses for receivables with similar characteristics. Individual customer balances which are over 60 days past due are reviewed individually for collectability. The Company does not have any off-balance sheet credit exposure related to its customers. Allowance for doubtful accounts was $25,000 as of September 30, 2023 and December 31, 2022.
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In the quarters ended September 30, 2023 and 2022, two customers accounted for 28% and 13% of total revenues during 2023, and two customers accounted for 22% and 10% of total revenues during 2022. In the nine-month periods ended September 30, 2023 and 2022, two customers accounted for 26% and 10% of revenues during 2023 and one customer accounted for 34% of revenues during 2022. As of September 30, 2023, three customers represented 32%, 26% and 12% of receivables and two customers represented 17% and 14% of receivables as of December 31, 2022.

Cash and Cash Equivalents

Cash and cash equivalents include bank demand deposits and money market funds that invest primarily in U.S. government securities.

Securities

The Company invests in highly liquid, marketable debt securities with high credit ratings and typically with maturities of two years or less. Individual securities are designated by the Company as either HTM or “available-for-sale” ("AFS") at the point of investment. Securities classified as short-term have maturities of less than one year. As of September 30, 2023, all marketable securities held by the Company are classified as available for sale and had remaining contractual maturities of one year or less.

HTM securities are valued on an amortized cost basis and reviewed to determine if an allowance for credit losses should be recorded in the statements of operations. AFS securities are valued at fair value. Unrealized gains and losses on AFS securities are included as a component of accumulated other comprehensive income in the balance sheets and statements of stockholders’ equity and a component of total comprehensive loss in the statements of comprehensive income loss. An AFS security is impaired if its fair value is less than amortized cost. Unrealized losses are evaluated to determine if the impairment is credit-related or non credit-related. Credit-related impairment is recognized as an allowance on the balance sheet with a corresponding adjustment to earnings, and a non credit-related impairment is recognized in other comprehensive income (loss). For certain types of securities, such as U.S. Treasuries, the Company generally expects zero credit losses. No allowance for credit losses was recorded on its securities portfolio as of September 30, 2023.

Fair Value

The Company follows the provisions of Financial Accounting Standards Board (the "FASB") Accounting Standards Codification ("ASC") Topic 820-10, Fair Value Measurements and Disclosures ("ASC 820-10"), which defines fair value, establishes a framework for measuring fair value in GAAP and requires certain disclosures about fair value measurements. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability.

As a basis for considering such assumptions, ASC 820-10 established a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows: Level 1 observable inputs such as quoted prices in active markets; Level 2 inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3 unobservable inputs for which there are little or no market data, which require the Company to develop its own assumptions. The hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value (See Note 5).

Use of Estimates
 
The preparation of financial statements in conformity with GAAP requires management to make significant estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during reporting periods. Actual results could differ from those estimates.




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Recent Accounting Pronouncements

Accounting Standards Updates ("ASUs") issued by the FASB are evaluated for their applicability. ASUs not included in the disclosures in this report were assessed and determined to be either not applicable or not expected to have a material impact on our financial statements.

Recently adopted accounting pronouncement

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments. The guidance in ASU 2016-13 replaces the incurred loss impairment methodology under current GAAP. The new impairment requires immediate recognition of estimated credit losses expected to occur for most financial assets and certain other instruments. It applies to all entities. For trade receivables, loans and HTM debt securities, entities are required to estimate lifetime expected credit losses. Trading and AFS debt securities are required to be recorded at fair value. SEC small reporting companies were required to adopt this new guidance in fiscal years beginning on or after December 15, 2022. The Company adopted this guidance on a prospective basis as of January 1, 2023 and had no material impact on the financial statements.

2.     Comprehensive Loss
 
For the quarter and nine months ended September 30, 2023, the Company had comprehensive income of 38,148 and 206,869, respectively for net unrealized gains on AFS securities, in addition to net loss in the statement of operations. There were no components of comprehensive income (loss) for the quarter and nine months ended September 30, 2022 other than net loss itself.
 
3.     Net Loss Per Common Share
 
Basic and dilutive net loss per common share were as follows:
Quarters Ended September 30,Nine Months Ended September 30,
2023202220232022
Net loss applicable to common stockholders$(1,768,737)$(1,606,254)$(4,879,940)$(3,724,739)
Weighted average number of common shares outstanding, basic and dilutive8,520,025 7,011,438 8,034,711 6,962,732 
Net loss per common share applicable to common stockholders, basic and diluted$(0.21)$(0.23)$(0.61)$(0.53)

Shares underlying the following securities were excluded from the calculation of diluted net loss per common share because their effect was anti-dilutive for each of the periods presented: 
September 30,
 20232022
Options520,299 525,468 
Unvested restricted stock awards61,292 106,550 
Unvested restricted stock units301,647 207,233 
Convertible preferred stock62 62 
Total883,300 839,313 

4. Securities

The Company's marketable debt securities are classified as either AFS or HTM pursuant to ASC 320 - Investments - Debt Securities. The following table summarizes the valuations and unrealized gains and losses of AFS securities which are recorded at estimated fair value as of September 30, 2023. The Company held no AFS securities as of December 31, 2022.
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 September 30, 2023
Gross Unrealized
Available-for-sale securitiesCost GainsLossesCredit LossesEstimated Fair Value
U.S. government bonds$4,393,086 $54,844 $— $— $4,447,930 
Commercial paper11,577,167 152,025 — — 11,729,192 
Total $15,970,253 $206,869 $— $— $16,177,122 

HTM securities are valued at amortized cost. The Company held no HTM securities as of September 30, 2023. The following tables summarize the valuations of HTM securities as of December 31, 2022.
 December 31, 2022
Held-to-maturity securitiesAmortized Cost Credit LossesEstimated Fair Value
U.S. government bonds$3,457,651 $— $3,456,580 
Corporate bonds4,011,569 — 3,950,380 
Commercial paper9,395,487 — 9,387,914 
Total $16,864,707 $— $16,794,874 

The Company evaluates all HTM and AFS securities for impairment at each reporting period. It determined that changes in the fair value of its securities at September 30, 2023 resulted primarily from interest rate fluctuations subsequent to the purchase date of the securities. There was no deterioration in the credit worthiness of the issuers and no credit losses were recorded as of September 30, 2023.

5.     Fair Value Measurements
 
The following tables set forth the Company’s financial instruments that were measured at fair value:

  September 30, 2023
 Total Level 1Level 2Level 3
Assets:    
Money market funds$827,002 $827,002 $— $— 
U.S. government bonds4,447,930 4,447,930 — — 
Commercial paper 11,729,192 — 11,729,192 — 
Total$17,004,124 $5,274,932 $11,729,192 $— 
 
  
 December 31, 2022
 Total Level 1 Level 2 Level 3
Assets:    
Money market funds$1,551,027 $1,551,027 $— $— 
Total$1,551,027 $1,551,027 $— $— 

The Company's accounts receivable, accounts payable, and accrued expenses are valued at cost which approximates fair value.
6.     Inventories
 
Inventories consist of the following: 

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 September 30, 2023December 31, 2022
Purchased components$1,245,623 $982,129 
Finished goods420,986 632,858 
 $1,666,609 $1,614,987 

The company recorded a charge of $63,420 in the nine months ended September 30, 2023 to reduce the carrying value of inventory to net realizable value.

7.     Accrued Expenses and Compensation
  
Accrued expenses and compensation consist of the following:
 September 30, 2023December 31, 2022
Professional services$335,201 $155,000 
Compensation329,559 249,224 
Clinical $43,524 $— 
Warranty 10,300 16,700 
Sales tax 128,986 131,621 
Other38,931 37,394 
 $886,501 $589,939 

8.     Operating Leases
 
The Company's lease on its Woburn, Massachusetts corporate office and manufacturing facility extends through September 2025 with a monthly base rent of $13,846 and a 5-year extension option. The Company's lease on its former corporate office in Waltham, Massachusetts (the "Waltham Lease") expired in February 2022. In the first quarter of 2022, a $60,000 reduction in rent expense was recorded upon return of the facility to the lessor. The letter of credit issued by a bank in favor of the Waltham facility was released. For the six months ended June 30, 2022, the Company recorded sublet income on the Waltham Lease totaling $22,795 within operating expenses on the Company's Statement of Operations.

Future minimum lease payments under this non-cancellable operating lease as of September 30, 2023 are as follows:
202341,446 
2024165,785 
2025117,431 
Total minimum lease payments$324,662 
Discount rate, 15%
$53,401 
Lease obligation, current portion148,391 
Lease obligation, net of current portion122,870 
$324,662 

Total recorded rent expense was $49,232 and $46,102, for the quarters ended September 30, 2023 and 2022, respectively. Total recorded rent expense was $147,696 and $116,959 for the nine months ended September 30, 2023 and 2022, respectively. The Company records rent expense on its facility lease on a straight-line basis over the lease term. The remaining operating lease term was two years as of September 30, 2023.

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9.     Stockholders’ Equity
 
Preferred stock and convertible preferred stock consist of the following: 
 September 30, 2023December 31, 2022
Preferred stock, $0.001 par value; 5,000,000 shares authorized at September 30, 2023 and December 31, 2022; no shares issued and outstanding at September 30, 2023 and December 31, 2022
$— $— 
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at September 30, 2023 and December 31, 2022; 200 shares issued and outstanding at September 30, 2023 and December 31, 2022
$1 $1 

2023 Equity Activity

In May 2023, the Company issued 12,500 restricted stock units under its 2022 Equity Incentive Plan with a value of $12,625.

In June 2023, the Company issued 725,291 shares of its common stock, under an at-the-market ("ATM") program for net proceeds of $691,405 and issued 10,526 shares of fully vested common stock with a value of $8,715 pursuant to the Company's Employee Stock Purchase Plan.

In July 2023, the Company issued 1,470 shares of its common stock, under ATM program for net proceeds of $1,426 and issued 24,500 restricted stock units under its 2004 Stock Option Plan with a value of $22,883.

In August 2023, the Company issued 172,660 restricted stock units with a value of $240,000 as long term incentives ("LTI") to its directors under its 2022 Equity Incentive Plan.

As of September 30, 2023, the Company has 61,292 restricted stock awards and 301,647 restricted stock units that remain unvested. At December 31, 2022, the Company had 96,250 restricted stock awards and 194,731 restricted stock units that were unvested.

2022 Equity Activity

In January 2022, the Company issued 292,500 shares of common stock under an ATM equity offering program with net proceeds of $1,943,052 and issued 20,000 restricted stock awards under its 2004 Stock Option Plan with a value of $104,200.

In April 2022, the Company issued 76,000 shares of restricted common stock under its 2022 Equity Incentive Plan with a value of $326,000 to employees as LTI and issued 50,213 shares of fully vested common stock with a value of $215,417 in settlement of management incentive compensation.

In May 2022, the Company issued 161,764 restricted stock units with a value of $550,000 as LTI to its management and directors under its 2022 Equity Incentive Plan.

In June 2022, the Company issued 2,503 shares of fully vested common stock with a value of $7,829 pursuant to the Company's Employee Stock Purchase Plan.

For the quarter ended September 30, 2022, the Company issued 57,972 restricted stock units with a value of $202,008 under its 2022 Equity Incentive Plan.
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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations
 
You should read the following discussion of our financial condition and results of operations in conjunction with our financial statements and the accompanying notes to those financial statements included elsewhere in this Quarterly Report on Form 10-Q. This discussion contains forward-looking statements that involve risks and uncertainties. For a description of factors that may cause our actual results to differ materially from those anticipated in these forward-looking statements, please refer to the below section of this Quarterly Report on Form 10-Q titled “Cautionary Note Regarding Forward-Looking Statements.” Unless the context otherwise requires, all references to “we”, “us”, the “Company”, or “NeuroMetrix” in this Quarterly Report on Form 10-Q refer to NeuroMetrix, Inc.

Business Overview

NeuroMetrix is a commercial stage neurotechnology company based in Woburn, Massachusetts. The Company’s mission is to improve individual and population health through the development of innovative medical devices and technology solutions for pain syndromes and neurological disorders. Our core expertise in biomedical engineering has been refined over two decades of designing, building and marketing medical devices that stimulate nerves and analyze nerve response for diagnostic and therapeutic purposes. We are fully integrated with in-house capabilities spanning research and development, regulatory affairs and compliance, sales and marketing, customer support, manufacturing, and product fulfillment. We hold extensive, proprietary intellectual property.

NeuroMetrix created the market for point-of-care nerve testing and introduced sophisticated wearable technology for chronic pain syndromes. Nearly five million patients have been served with our products. Revenue is derived from the sale of medical devices and after-market consumable products and accessories in the United States and select overseas markets. Products are authorized by the U.S. Food and Drug Administration ("FDA") and regulators in foreign jurisdictions where appropriate. We have two principal product categories:

–Therapeutics – wearable neuromodulation for chronic pain syndromes
–Diagnostics – point-of-care peripheral neuropathy assessment

Chronic pain is a significant public health problem. It is defined by the National Institutes of Health (NIH) as pain lasting more than 12 weeks. This contrasts with acute pain which is a normal bodily response to injury or trauma. Chronic pain conditions include lower extremity pain, low back pain, arthritis, fibromyalgia, neuropathic pain, cancer pain and many others. Chronic pain may be triggered by an injury or there may be an ongoing cause such as disease or illness. There may also be no clear cause. Chronic pain can also lead to other health problems. These can include fatigue, sleep disturbance and mood changes, which cause difficulty in carrying out important activities and contributing to disability and despair. In many cases, chronic pain cannot be cured. Treatment of chronic pain is focused on reducing pain and improving function. The goal is effective pain management.

Chronic pain is estimated to affect nearly 100 million adults in the United States. The most common approach to chronic pain management is pain medication. This includes over-the-counter (“OTC”) internal and external analgesics as well as prescription pain medications, both non-opioid and opioid. The approach to treatment is individualized, drug combinations may be employed, and the results are often inadequate. Side effects, including the potential for addiction, are substantial. Nerve stimulation is a long-established category of treatment for chronic pain. This treatment approach is available through implantable devices which have both surgical and ongoing risks. Non-invasive approaches involving transcutaneous electrical nerve stimulation have achieved limited efficacy in practice due to power limitations, inadequate dosing and low patient adherence. We believe that our Quell wearable technology for chronic pain is designed to address many of these limitations.

Peripheral neuropathies are diseases of the peripheral nerves that affect about 10% of adults in the United States, with the prevalence rising to over 30% among individuals 65 years and older. Peripheral neuropathies are associated with loss of sensation, pain, increased risk of falling, weakness, and other complications. People with peripheral neuropathies often experience a diminished quality of life, poor overall health and higher mortality. The most common specific cause of peripheral neuropathies, accounting for about one-third of cases, is diabetes. The most common long-term complication of diabetes, affecting over 50% of the diabetic population, is diabetic peripheral neuropathy ("DPN"). Early detection of peripheral neuropathies, such as DPN, is important because there are no treatment options once the nerves have degenerated. Today’s diagnostic methods for peripheral neuropathies range from a simple monofilament test for lack of sensory perception in the feet
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to a nerve conduction study performed by a specialist. Our DPNCheck nerve conduction technology provides a rapid, low cost, quantitative test for peripheral neuropathies, including DPN. It addresses an important medical need and is particularly effective in screening large populations. DPNCheck has been validated in multiple clinical studies.

Business Strategy

Quell, our wearable neuromodulation technology for chronic pain, has been refined over the past seven years with over 200,000 chronic pain patients and is covered by over 20 U.S. utility patents. Patients control and personalize the technology via a mobile phone app, and their utilization and certain clinical metrics may be tracked in the Quell Health Cloud. The degree of technological sophistication, combined with our extensive consumer experience and the compelling results of clinical studies, has provided us the opportunity to redirect this proven technology away from the commodity-oriented OTC market and into an emerging portfolio of specialized, disease indicated, prescription wearable neurotherapeutics. As a multi-indication platform, the potential addressable market for Quell exceeds 25 million patients in the United.States alone.

The Quell opportunity to pivot from OTC to prescription was confirmed when Quell received FDA Breakthrough Device Designation for a fibromyalgia indication in 2021, followed by a second FDA Breakthrough Device Designation for a chronic Chemotherapy Induced Peripheral Neuropathy (“CIPN”) indication in 2022. A double-blind, randomized, sham-controlled clinical study supported a 2022 Quell Fibromyalgia De Novo submission to FDA. Marketing authorization was granted by FDA as an aid for reducing the symptoms of fibromyalgia in adults with high pain sensitivity. A limited strategic launch of Quell Fibromyalgia was initiated during the last quarter of 2022 to better understand market dynamics and refine the sales fulfillment process. The strategic launch was expanded during the third quarter of 2023 with a direct sales presence in the large markets of Florida, Texas and California.

The University of Rochester School of Medicine and Dentistry reported results of an NIH-funded multi-center randomized sham-controlled trial of Quell for CIPN. The trial results indicated a statistically meaningful reduction in moderate to severe CIPN symptoms of pain and muscular cramping in patients using Quell. The clinical work will support an FDA regulatory submission to market Quell with a CIPN indication planned for late 2023 or early 2024. If approved, commercial launch of Quell for CIPN could occur in late 2024.

Beyond fibromyalgia and CIPN, our Quell indications pipeline includes Chronic Low Back Pain with Pain Hypersensitivity, Chronic Overlapping Pain Conditions, and Painful Diabetic Neuropathy. These initiatives are in varying stages of development of clinical evidence.

Our DPNCheck diagnostic technology for peripheral neuropathies, particularly for diabetic peripheral neuropathy, has been validated in multiple clinical studies over the past decade. This technology was recently updated with the launch of the next-generation DPNCheck device which significantly enhances the user experience, improves testing efficiency, and continues to deliver quantitative results with high sensitivity and specificity.

Historically, our domestic DPNCheck commercial efforts have focused on the Medicare Advantage (“MA”) market sector where patient enrollment during 2023 will likely exceed traditional fee-for-service Medicare patients. This market was disrupted during the first quarter of 2023 when the Centers for Medicare and Medicaid Services ("CMS") announced dramatic policy changes regarding risk adjustment data validation ("RADV") and patient risk factor adjustment coding. RADV changes have been implemented, and risk factor coding changes are being implemented in stages over a three-year period. The coding changes significantly reduce CMS reimbursement payments to MA healthcare providers and, in effect, curtail financial incentives for several aspects of patient screening, including for neuropathy and other health-related issues.

As a result of the CMS changes, we experienced a significant reduction in DPNCheck revenues during the past nine months in comparison with the prior year. It is unlikely that there will be near term revisions to risk factor coding that would be favorable to patients and to our Company. Consequently, we are developing a long-term DPNCheck strategy that will preserve as much as possible of our MA business while identifying meaningful opportunities for growth. Several areas are under consideration, the most prominent of which is a broader focus on large, value-based healthcare providers with a patient constituency beyond MA. Also under consideration is a disease-focused marketing approach which might cover diabetes and related areas such as renal and oncology care.

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ADVANCE is our legacy, point-of-care neurodiagnostic technology used primarily for the diagnosis and screening for carpal tunnel syndrome. While ADVANCE devices are no longer sold, we continue to provide consumables and repair services to our customer base of hand surgeons and manufacturers for use in industrial health.

Results of Operations
 
Comparison of Quarters Ended September 30, 2023 and 2022
 
Quarter ended September 30,Increase (Decrease)
20232022Amount Percent
Revenues$1,203,164 $1,968,003 $(764,839)(38.9)%
Gross profit781,782 1,274,432 $(492,650)(38.7)%
–% of revenues
65.0 %64.8 %0.2 %
Operating expenses2,742,680 2,987,423 $(244,743)(8.2)%
Interest income 25,378 106,737 $(81,359)(76.2)%
Other income 166,783 — $166,783 100.0 %
Net loss$(1,768,737)$(1,606,254)$162,483 10.1 %
Net loss per common share$(0.21)$(0.23)$(0.02)(8.7)%

Revenues

Revenues for the third quarter of 2023 decreased by $765 thousand or 38.9% compared to the third quarter of 2022. The revenue decline was primarily attributable to DPNCheck sales made into the MA market. Healthcare providers in that market are experiencing significant reductions in patient reimbursement due to dramatic changes initiated by CMS in early 2023 which reduce and ultimately remove key financial incentives for patient screening, including for neuropathy. The Company has felt the effect of CMS changes as certain key customers have reduced or eliminated patient screening with DPNCheck. Quell sales were also lower in the 2023 third quarter reflecting the strategic transition to prescription indications and away from over-the-counter sales. Quell fibromyalgia is the initial prescription indication with other potential indications in the clinical and development pipeline. The legacy ADVANCE business continues to be managed for cash flow.

Gross Profit

Gross profit for the third quarter of 2023 decreased by $493 thousand or 38.7% compared to the third quarter of 2022. The decline in revenue, particularly DPNCheck, was the largest contributor to the reduction in gross profit. The gross profit rate as a percentage of revenue was approximately flat between the periods.

Operating Expenses

Operating expenses declined in the third quarter of 2023 by $245 thousand or 8.2% compared to the third quarter of 2022. Research and development spending, particularly for consulting services and clinical and development costs was lower by $482 thousand or 44.9% due to the timing of certain engineering projects and clinical trials. Sales and marketing personnel costs increased by $180 thousand or 41.5% with the expansion of the Quell fibromyalgia sales force. General and administrative costs increased by $104 thousand or 9.4% due to higher consulting and professional fees.

Net loss

The net loss in the third quarter of 2023 increased by $162 thousand or 10.1% compared to the third quarter of 2022. The net loss per common share decreased to ($0.21) per common share in the third quarter of 2023 from ($0.23) per common share in the third quarter of 2022.

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Comparison of Nine Months Ended September 30, 2023 and 2022
  
Nine months ended September 30,Increase (Decrease)
20232022Amount Percent
Revenues$4,583,679 $6,408,695 $(1,825,016)(28.5)%
Gross profit$3,099,439 $4,520,129 $(1,420,690)(31.4)%
–% of revenues
67.6 %70.5 %(2.9)%
Operating expenses$8,393,861 $8,405,428 $(11,567)(0.1)%
Interest income 247,699 160,560 87,139 54.3 %
Other income 166,783 — 166,783 100.0 %
Net loss$(4,879,940)$(3,724,739)$1,155,201 31.0 %
Net loss per common share$(0.61)$(0.53)$0.08 15.1 %

Revenues

Revenues for the nine months ended September 30, 2023 decreased by $1.8 million or 28.5% compared to the nine months ended September 30, 2022. DPNCheck sales, primarily focused on MA, accounted for the majority of revenues in both periods and a decline in these sales was the primary contributor to the revenue decline in the year-to-date 2023 period.

Gross Profit

Gross profit for the nine months ended September 30, 2023 decreased by $1.4 million or 31.4% compared to the corresponding period in 2022. The decline in revenue, particularly DPNCheck revenue, was the largest contributor to the reduction in gross profit. The gross profit rate in the nine months ended September 30, 2023 contracted from the prior year period by 2.9 percentage points primarily due to lower margin Quell fibromyalgia sales which were initiated in 2023.

Operating Expenses

Operating expenses in the nine months ended September 30, 2023 were approximately flat with the corresponding period in 2022. Research and development costs declined by $656 thousand or 24.3% due to project timing. Sales and marketing costs increased by $269 thousand or 12.0% primarily due to increased Quell personnel costs offset by reduced promotional spending. General and administrative costs increased by $375 thousand of 10.8% due to higher personnel costs and professional fees.

Net loss

The net loss for the nine months ended September 30, 2023 increased by $1.2 million or 31% compared to the corresponding period in 2022. Similarly, net loss per common share increased to ($0.61) per common share in the nine months ended September 30, 2023 from ($0.53) per common share in the corresponding period in 2022. The increase in the number of common shares outstanding in the nine months ended September 30, 2023 partially offset the effect of a greater net loss in that period.
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Liquidity and Capital Resources
 
The following table contains certain key performance indicators we believe depict our liquidity and cash flow position:
September 30, December 31,
202320222022
 
Cash and cash equivalents $1,460,553 $1,772,005 $4,335,020 
Securities$16,177,122 $19,054,654 16,864,707 
Working capital $19,445,277 $21,599,577 $23,000,575 
Current ratio16.4 12.8 21.8 
Net debt position$(16,254,439)$(18,760,537)$(19,885,799)
Days sales outstanding50.9 28.6 20.9 
Inventory turnover1.02.9 1.8 

Our primary sources of liquidity are cash and cash equivalents, securities, revenues from the sales of our products, and net proceeds from equity sales. Our expected cash outlays relate to funding operations. We believe that our resources are sufficient to fund our cash requirements over at least the next twelve months from the date of issuance of the financial statements.

As of September 30, 2023, we held $17.6 million in cash, cash equivalents, and securities. Working capital was $19.4 million, and the current ratio of working capital was 16.4. The Company had no term debt or borrowings. Net debt, defined as short and long-term debts (liabilities), less cash and cash equivalents and securities, continues to be negative.

Days sales outstanding ("DSO") reflect our customer payment terms which vary from payment on order to 60 days from shipment date. The increase in DSO to 50.9 on September 30, 2023 in comparison with 28.6 on September 30, 2022 is primarily due to collection delays with two large MA customers who recently implemented new accounts payable systems causing disruption to payment cycles. The Company is currently working with these customers and towards resolution of these delays. The inventory turnover rate declined during the quarter ended September 30, 2023 due to the drop in sales and increase in inventory balances.

Cash Flows
Nine months ended September 30,
 20232022Change
 
Net cash provided by (used in):
Operating activities
$(4,634,367)$(3,806,422)$827,945 
Investing activities
1,058,354 (18,944,558)(20,002,912)
Financing activities
701,546 1,950,881 (1,249,335)
Net change in cash and cash equivalents$(2,874,467)$(20,800,099)

Operating Activities
Cash used in operating activities in the nine months ended September 30, 2023 increased by $828 thousand from the comparable period in 2022. This primary contributor to the change in operating cash usage was the higher operating loss of $1,155 thousand partially offset by changes in working capital usage.

Investing Activities

Investing activities in the nine months periods ended September 30 2023 reflected a reduction of $1.1 million in portfolio investments as resources were shifted to support operations. During the nine months period ended September 30, 2022 the Company deployed cash of approximately $18.9 million to purchase investment grade securities. The cash invested in portfolio
15




assets is for the short term and, while it is not forecasted to be essential to the Company’s near-term operations requirements, provides a cushion if necessary.

Financing Activities

Equity sales in the nine months periods ended September 30, 2023 and 2022 contributed $702 thousand and $1.9 million, respectively. Shares of our common stock were sold to investors pursuant to the Company's ATM facility.

On October 22, 2021, we entered into an At Market Issuance Sales Agreement (the “ATM Sales Agreement”) with Ladenburg Thalmann & Co. Inc. (the “Sales Agent”), pursuant to which we can offer and sell, from time to time at our sole discretion, shares of our common stock having an aggregate offering price of up to $25 million through the Sales Agent in an “at the market offering.” The Sales Agent will receive a commission of 3.0% of the gross proceeds of any common stock sold under the ATM Sales Agreement. On August 31, 2022, Amendment 1 was filed which limited the amount of common stock we may offer and sell up to $7.6 million due to Securities and Exchange Commission ("SEC") limitations. During the nine months ended September 30, 2023, we sold 726,761 shares of our common stock, net of banker, audit and legal fees, for proceeds of $692,831 pursuant to the ATM Sales Agreement.

We continue to maintain an effective shelf registration statement covering the sales of shares of our common stock and other securities, giving us the opportunity to raise funding when needed or otherwise considered appropriate at prices and on terms to be determined at the time of any such offerings. Pursuant to the instructions to Form S-3, we have the ability to sell shares under the shelf registration statement, during any 12-month period, in an amount less than or equal to one-third of the aggregate market value of our common stock held by non-affiliates. If we raise additional funds by issuing equity or debt securities, either through the sale of securities pursuant to a registration statement or by other means, our existing stockholders may experience dilution, and the new equity or debt securities may have rights, preferences and privileges senior to those of our existing stockholders.

On August 8, 2023, we received a notice from the Listing Qualifications Department of the Nasdaq Stock Market indicating that, for the last 30 consecutive business days, the bid price for our common stock had closed below the minimum $1.00 per share required for continued inclusion in the Nasdaq Capital Market under Nasdaq Listing Rule 5550(a)(2). The notification letter states that pursuant to Nasdaq Listing Rule 5810(c)(3)(A), the Company will be afforded 180 calendar days, or until February 5, 2024, to regain compliance with the minimum bid price requirement. In order to regain compliance, shares of the Company’s common stock must maintain a minimum bid closing price of at least $1.00 per share for a minimum of 10 consecutive business days. If we do not regain compliance by February 5, 2024, Nasdaq will provide written notification to us that our common stock will be delisted. At that time, we may appeal Nasdaq’s delisting determination to a Nasdaq Listing Qualifications Panel. Alternatively, we may be eligible for an additional 180-day grace period if we satisfy all of the requirements, other than the minimum bid price requirement, for listing on The Nasdaq Capital Market set forth in Nasdaq Listing Rule 5505. The notification letter has no effect at this time on the listing of our common stock on the Nasdaq Capital Market. We intend to actively monitor the bid price for our common stock between now and February 5, 2024.

Critical Accounting Polices and Estimates

The discussion and analysis of our financial condition and results of operations are based upon our unaudited financial statements, which have been prepared in accordance with generally accepted accounting principles for interim financial information. The preparation of these unaudited financial statements requires us to make estimates and assumptions about future events that affect the amounts reported in our financial statements. Actual results may differ from these estimates. The critical accounting policies and the significant judgments and estimates used in the preparation of our unaudited financial statements for the three and nine months ended September 30, 2023, were consistent with those discussed in our Annual Report on Form 10-K for the year ended December 31, 2022.

Recent Developments

At a special meeting of stockholders held on October 19, 2023, our stockholders approved a reverse stock split, if needed in the discretion of our Board of Directors, to regain compliance with the Nasdaq minimum bid price requirement as discussed above, at a ratio between 1:2 and 1:8, inclusive. On October 25, 2023, the closing price of our common stock was $0.67 per share.



16





Cautionary Note Regarding Forward-Looking Statements
 
The statements contained in this Quarterly Report on Form 10-Q, including under the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and other sections of this Quarterly Report, include forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), including, without limitation, statements regarding our or our management’s expectations, hopes, beliefs, intentions or strategies regarding the future, such as our estimates regarding anticipated operating losses, future revenues and projected expenses, our future liquidity and our expectations regarding our needs for and ability to raise additional capital; our ability to maintain the listing of our common stock on the Nasdaq Capital Market; our ability to manage our expenses effectively and raise the funds needed to continue our business; our belief that there are unmet needs and our estimates regarding the addressable market for the management of chronic pain and in the diagnosis and treatment of diabetic neuropathy; our expectations surrounding our commercialized neurostimulation and neuropathy diagnostic products; our expected timing and our plans to develop and commercialize our products; our ability to meet our proposed timelines for the commercial availability of our products; our ability to obtain and maintain regulatory approval of our existing products and any future products we may develop; regulatory and legislative developments in the United States and foreign countries; the performance of our third-party manufacturers; our ability to obtain and maintain intellectual property protection for our products; the successful development of our sales and marketing capabilities; the size and growth of the potential markets for our products and our ability to serve those markets; our estimate of our customer returns of our products; the rate and degree of market acceptance of any future products; our reliance on key scientific management or personnel; the payment and reimbursement methods used by private or government third party payers; and other factors discussed elsewhere in this Quarterly Report on Form 10-Q. The words “believe,” “may,” “will,” “estimate,” “continue,” “anticipate,” “intend,” “expect,” “plan” and similar expressions may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. The forward-looking statements contained in this quarterly report are based on our current expectations and beliefs concerning future developments and their potential effects on us. There can be no assurance that future developments affecting us will be those that we have anticipated. These forward-looking statements involve a number of risks, uncertainties (some of which are beyond our control) or other assumptions that may cause actual results or performance to be materially different from those expressed or implied by these forward-looking statements. These risks and uncertainties include, but are not limited to, those factors described in the section titled “Risk Factors” in our Annual Report on Form 10-K. Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove incorrect, actual results may vary from those projected in these forward-looking statements. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required under applicable securities laws.
 
Item 3. Quantitative and Qualitative Disclosures About Market Risk
 
We do not use derivative financial instruments in our investment portfolio and have no foreign exchange contracts. Our financial instruments consist of cash and cash equivalents and available for sale debt securities. We consider investments that, when purchased, have a remaining maturity of 90 days or less to be cash equivalents. The primary objectives of our investment strategy are to preserve principal, maintain proper liquidity to meet operating needs, and maximize yields. To minimize our exposure to an adverse shift in interest rates, we invest mainly in cash equivalents and investments with a maturity of twelve months or less and we maintain an average maturity of twelve months or less. We do not believe that a notional or hypothetical 10% change in interest rate percentages would have a material impact on the fair value of our investment portfolio or our interest income.
 
17




Item 4. Controls and Procedures
 
(a) Evaluation of Disclosure Controls and Procedures. Our principal executive officer and principal financial officer, after evaluating the effectiveness of our disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) as of September 30, 2023, have concluded that, based on such evaluation, our disclosure controls and procedures were effective to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms, and is accumulated and communicated to our management, including our principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.
 
(b) Changes in Internal Controls. In connection with our evaluation of the Company’s internal controls over financial reporting during 2022, we identified a control deficiency in inventory accounting which represented a material weakness in our controls over financial reporting as of December 31, 2022. Specifically, our controls were not designed or implemented to ensure the proper review and determination of inventory costing, and the valuation of inventory net realizable value. The Company has taken steps to remediate the material weakness in inventory accounting controls by expanding its period-end closing process to require that the Corporate Controller perform and document a review of inventory costing and also prepare an analysis of inventory net realizable value, which analysis is required to be reviewed and approved by the Chief Financial Officer. This change in internal controls was implemented during the closing process for the first quarter of 2023 and was maintained in each quarterly closing thereafter.

18




PART II – OTHER INFORMATION
 
Item 1. Legal Proceedings
 
While we are not currently a party to any material legal proceedings, we could become subject to legal proceedings in the ordinary course of business. We are not aware of and do not expect any such potential issues. However, should they occur, we would not expect them to have a significant impact on our financial position.
 
Item 1A. Risk Factors
 
Please refer to the complete “Item 1A. Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2022 for risks and uncertainties facing the Company that may have material adverse effect on the Company's business prospects, financial condition and results of operations. In addition, we are supplementing the risk factors previously disclosed in our Annual Report on Form 10-K for the year ended December 31, 2022 to add the following new risk factors:

Our shares of common stock could be delisted from the Nasdaq Capital Market, which could result in, among other things, a decline in the price of our common stock and less liquidity for holders of shares of our common stock.

Our common stock is listed on the Nasdaq Capital Market, which imposes, among other requirements, a minimum $1.00 per share bid price requirement for continued inclusion on the Nasdaq pursuant to Nasdaq Listing Rule 5550(a)(2). The closing bid price for our common stock must remain at or above $1.00 per share to comply with the bid price requirement for continued listing on Nasdaq.

As previously disclosed, on August 8, 2023, we received a deficiency letter from the Nasdaq Listing Qualifications Department (the “Staff”) notifying us that because the closing bid price of our common stock had fallen below $1.00 per share for 30 consecutive business days, we no longer met the bid price requirement. Pursuant to Nasdaq Listing Rule 5810(c)(3)(A), we have an initial period of 180 calendar days, or until February 5, 2024, to regain compliance with the bid price requirement. To regain compliance, the closing bid price of our common stock must meet or exceed $1.00 per share for a minimum of 10 consecutive business days (unless the Staff exercises its discretion to extend this 10-day period pursuant to Nasdaq Listing Rule 5810(c)(3)(H)). However, if during the compliance period our common stock has a closing bid price of $0.10 or less for 10 consecutive trading days, Nasdaq will issue a Staff Delisting Determination with the potential opportunity for us to appeal that determination.

If we do not regain compliance with the bid price requirement by February 5, 2024, we may be eligible for an additional 180 calendar day compliance period. To qualify, we would need to meet the continued listing requirement for the market value of publicly held shares and all other initial listing standards for The Nasdaq Capital Market, with the exception of the bid price requirement, and would need to provide written notice of our intention to cure the deficiency during the second compliance period, by effecting a reverse stock split, if necessary. If the Staff concludes that we will not be able to cure the deficiency, or if we do not regain compliance with the bid price requirement within such additional 180 calendar day compliance period, the Staff will provide written notification to us that our common stock will be subject to delisting. At that time, we may appeal the Staff’s delisting determination to a Nasdaq Listing Qualifications Panel. However, there can be no assurance that, if we receive a delisting notice and appeal the delisting determination by the Staff to the Nasdaq Listing Qualifications Panel, such appeal would be successful.

Additionally, delisting from Nasdaq could make trading our common stock more difficult for investors, potentially leading to further declines in our share price and liquidity. If our common stock is delisted by Nasdaq, our common stock may be eligible to trade on an over-the-counter quotation system, where an investor may find it more difficult to sell our stock or obtain accurate quotations as to the market value of our common stock. We cannot assure you that our common stock, if delisted from Nasdaq, will be listed on another national securities exchange or quoted on an over-the counter quotation system.

We may effect a reverse stock split of our common stock, but it may not result in us obtaining the intended benefits.

At a special meeting of stockholders held on October 19, 2023, our stockholders approved a reverse stock split, if needed in the discretion of our Board of Directors, to regain compliance with Nasdaq’s bid price requirement, at a ratio between 1:2 and 1:8, inclusive. On October 25, 2023, the closing price of our common stock was $0.67 per share. If we do effect a reverse stock split, there can be no assurance that the market price per new share of our common stock after the reverse stock split will remain unchanged or increase in proportion to the reduction in the number of old shares of our common stock outstanding before the reverse stock split. Other factors, such as our financial results, market conditions and the market perception of our business may adversely affect the market price of our common stock and there can be no assurance that a reverse stock split, if completed, will result in the intended benefits, that the market price of our common stock will increase in proportion to the
19




reduction in the number of shares of our common stock outstanding before the reverse stock split or that the market price of our common stock will not decrease in the future. If the market price of our common stock does not increase or remain above the bid price requirement following the reverse stock split, our common stock may still be delisted from Nasdaq.


If we implement a reverse stock split, liquidity of our common stock may be adversely affected.

If we do effect a reverse stock split, the liquidity of the shares of our common stock may be affected adversely by any such reverse stock split given the reduced number of shares of common stock that will be outstanding following the reverse stock split, especially if the market price of our common stock does not increase as a result of the reverse stock split. Following any reverse stock split, the resulting market price of our common stock may not attract new investors and may not satisfy the investing requirements of those investors. Although we believe a higher market price of our common stock may help generate greater or broader investor interest, there can be no assurance that the reverse stock split will result in a share price that will attract new investors, including institutional investors. In addition, there can be no assurance that the market price of our common stock will satisfy the investing requirements of those investors. As a result, the trading liquidity of our common stock may not necessarily improve.

Item 2.   Unregistered Sales of Equity Securities and Use of Proceeds
None.

Item 3.    Defaults Upon Senior Securities
 
None. 

Item 4.    Mine Safety Disclosures
 
Not applicable. 

Item 5.    Other Information
 
During the third quarter of 2023, none of our directors or executive officers adopted or terminated any contract, instruction or written plan for the purchase or sale of our securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c), and none of our directors or executive officers adopted or terminated a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K).
 
20




Item 6.    Exhibits

Exhibit No. Description
 Certification of Principal Executive Officer Under Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended, and pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002. Filed herewith.
   
 Certification of Principal Financial Officer Required Under Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended, and pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Filed herewith.
   
 Certification of Principal Executive Officer and Principal Financial Officer Required Under Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934, as amended, and 18 U.S.C. Section 1350. Furnished herewith.
101.INSInline XBRL Instance Document (the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document). Filed herewith.
101.SCHInline XBRL Taxonomy Extension Schema Document. Filed herewith.
101.CALInline XBRL Taxonomy Extension Calculation Linkbase Document. Filed herewith.
101.DEFInline XBRL Taxonomy Extension Definition Linkbase Document. Filed herewith.
101.LABInline XBRL Taxonomy Extension Label Linkbase Document. Filed herewith.
101.PREInline XBRL Taxonomy Extension Presentation Linkbase Document. Filed herewith.
104Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101). Filed herewith.
21



SIGNATURES
 
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
 
  NEUROMETRIX, INC.
  
October 26, 2023/s/SHAI N. GOZANI, M.D., PH. D.
  Shai N. Gozani, M.D., Ph. D.
  Chairman, President and Chief Executive Officer
  
October 26, 2023/s/THOMAS T. HIGGINS
  Thomas T. Higgins
  Senior Vice President, Chief Financial Officer and Treasurer
 
22

EXHIBIT 31.1
 
CERTIFICATION
 
I, Shai N. Gozani, M.D., Ph.D., certify that:
 
1.I have reviewed this Quarterly Report on Form 10-Q of NeuroMetrix, Inc.;
2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
a)designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
b)designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
c)evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d)disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and
5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):
a)all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and
b)any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.
 


Date:October 26, 2023/s/ SHAI N. GOZANI, M.D., PH. D.
 Shai N. Gozani, M.D., Ph.D.
 Chairman, President and Chief Executive Officer


EXHIBIT 31.2
 
CERTIFICATION
 
I, Thomas T. Higgins, certify that:
1.I have reviewed this Quarterly Report on Form 10-Q of NeuroMetrix, Inc.;
2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;
3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;
4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
a)designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;
b)designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;
c)evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and
d)disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and
5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):
a)all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and
b)any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.
 



Date:October 26, 2023/s/ THOMAS T. HIGGINS
 Thomas T. Higgins
 Senior Vice President, Chief Financial Officer and Treasurer


EXHIBIT 32
 
CERTIFICATION
 
Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of NeuroMetrix, Inc., a Delaware corporation (the "Company"), does hereby certify, to such officer's knowledge, that:
 
The Quarterly Report for the quarter ended September 30, 2023 (the "Form 10-Q") of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.
 
 /s/ SHAI N. GOZANI, M.D., PH. D.
 Shai N. Gozani, M.D., Ph.D.
 Chairman, President and Chief Executive Officer
  
  
 /s/ THOMAS T. HIGGINS
 Thomas T. Higgins
 Senior Vice President, Chief Financial Officer and Treasurer
  
October 26, 2023
  
This certification is being furnished and not filed, and shall not be incorporated into any document for any purpose, under the Securities Exchange Act of 1934 or the Securities Act of 1933.

v3.23.3
Document And Entity Information - shares
 9 Months Ended
Sep. 30, 2023
Oct. 25, 2023
Document Information [Line Items]    
Entity Central Index Key 0001289850  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2023  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   8,591,374
Entity Emerging Growth Company false  
Entity Shell Company false  
Document Type 10-Q  
Entity Current Reporting Status Yes  
Entity Small Business true  
Entity Interactive Data Current Yes  
Security Exchange Name NASDAQ  
Trading Symbol NURO  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2023  
Document Transition Report false  
Entity File Number 001-33351  
Entity Registrant Name NEUROMETRIX, INC.  
Entity Incorporation, State or Country Code DE  
Entity Address, Postal Zip Code 01801  
Local Phone Number 890-9989  
Entity Filer Category Non-accelerated Filer  
Entity Tax Identification Number 04-3308180  
Entity Address, Address Line One 4B Gill Street  
Entity Address, City or Town Woburn  
Entity Address, State or Province MA  
City Area Code 781  
Title of 12(b) Security Common Stock, $0.0001 par value per share  
v3.23.3
Balance Sheets - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 1,460,553 $ 4,335,020
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss 0 16,864,707
Debt Securities, Available-for-Sale 16,177,122 0
Accounts receivable, net 614,381 646,771
Inventories 1,666,609 1,614,987
Prepaid expenses and other current assets 786,978 645,502
Total current assets 20,705,643 24,106,987
Fixed assets, net 272,838 165,619
Operating Lease, Right-of-Use Asset 281,891 370,609
Other Assets, Noncurrent 26,400 26,400
Total assets 21,286,772 24,669,615
Current liabilities:    
Accounts payable 225,474 368,082
Accrued expenses and compensation 886,501 589,939
Operating Lease, Liability, Current 148,391 148,391
Total current liabilities 1,260,366 1,106,412
Operating Lease, Liability, Noncurrent 122,870 207,516
Total liabilities 1,383,236 1,313,928
Commitments and contingencies
Stockholders’ equity:    
Common Stock, Value, Issued 859 777
Additional paid-in capital 228,155,613 226,934,775
Accumulated Other Comprehensive Income (Loss), Net of Tax 206,869 0
Accumulated deficit (208,459,806) (203,579,866)
Total stockholders’ equity 19,903,536 23,355,687
Total liabilities and stockholders’ equity $ 21,286,772 $ 24,669,615
Common Stock, Par or Stated Value Per Share $ 0.0001 $ 0.0001
Common Stock, Shares Authorized 25,000,000 25,000,000
Common Stock, Shares, Issued 8,588,455 7,771,938
Common Stock, Shares, Outstanding 8,588,455 7,771,938
Convertible preferred stock    
Stockholders’ equity:    
Preferred stock $ 1 $ 1
Preferred Non-Convertible Stock    
Stockholders’ equity:    
Preferred stock $ 0 $ 0
v3.23.3
Statements of Operations (Unaudited) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Revenue from Contract with Customer, Including Assessed Tax $ 1,203,164 $ 1,968,003 $ 4,583,679 $ 6,408,695
Other Nonoperating Income 166,783 0 166,783 0
Net loss $ (1,768,737) $ (1,606,254) $ (4,879,940) $ (3,724,739)
Earnings Per Share, Diluted $ (0.21) $ (0.23) $ (0.61) $ (0.53)
Earnings Per Share, Basic $ (0.21) $ (0.23) $ (0.61) $ (0.53)
Loss from operations $ (1,960,898) $ (1,712,991) $ (5,294,422) $ (3,885,299)
Operating expenses:        
Research and development 592,654 1,074,954 2,045,588 2,701,330
Sales and marketing 943,795 810,209 2,504,630 2,235,646
General and administrative 1,206,231 1,102,260 3,843,643 3,468,452
Total operating expenses 2,742,680 2,987,423 8,393,861 8,405,428
Gross profit 781,782 1,274,432 3,099,439 4,520,129
Cost of revenues 421,382 693,571 1,484,240 1,888,566
Investment Income, Interest $ 25,378 $ 106,737 $ 247,699 $ 160,560
v3.23.3
Statement of Comprehensive Income (Statement) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Net Income (Loss) Attributable to Parent $ (1,768,737) $ (1,606,254) $ (4,879,940) $ (3,724,739)
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax 204,931 0 373,652 0
Other Comprehensive Income Realized Gain Adjustment (166,783)   (166,783)  
Comprehensive Income (Loss), Net of Tax, Attributable to Parent $ (1,730,589) $ (1,606,254) $ (4,673,071) $ (3,724,739)
v3.23.3
Equity Rollforward Statement - USD ($)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Preferred Stock
Convertible Preferred Stock [Member]
Common Stock [Member]
AOCI Attributable to Parent
Stockholders' Equity Attributable to Parent $ 23,215,786   $ 222,378,374 $ (199,163,257) $ 1 $ 668  
Shares, Outstanding         200 6,650,480  
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 37,632   37,632        
Stock Issued During Period, Shares, New Issues   292,500          
Stock Issued During Period, Value, New Issues 1,943,052 $ 29 1,943,023        
Stock Issued During Period, Value, Restricted Stock Award, Gross   $ (3) 3        
Stock Issued During Period, Shares, Restricted Stock Award, Gross   1,759          
Net Income (Loss) Attributable to Parent (958,562)     (958,562)      
Net Income (Loss) Attributable to Parent (3,724,739)            
Stockholders' Equity Attributable to Parent 24,237,908   224,359,026 (200,121,819) $ 1 $ 700  
Shares, Outstanding         200 6,944,739  
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 109,340   109,340        
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture   50,213          
Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture 215,417 $ 5 215,412        
Stock Issued During Period, Shares, Employee Stock Purchase Plans   2,503          
Stock Issued During Period, Value, Employee Stock Purchase Plan 7,829   7,829        
Stock Issued During Period, Value, Restricted Stock Award, Gross   $ (7) (7)        
Stock Issued During Period, Shares, Restricted Stock Award, Gross   3,120          
Net Income (Loss) Attributable to Parent (1,159,923)     (1,159,923)      
Stockholders' Equity Attributable to Parent 23,410,571   224,691,600 (201,281,742) $ 1 $ 712  
Shares, Outstanding         200 7,000,575  
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 161,951   161,951        
Stock Issued During Period, Value, Restricted Stock Award, Gross $ (202,008) $ (1) (1)        
Stock Issued During Period, Shares, Restricted Stock Award, Gross 57,972 16,578          
Net Income (Loss) Attributable to Parent $ (1,606,254)     (1,606,254)      
Stockholders' Equity Attributable to Parent 21,966,268   224,853,550 (202,887,996) $ 1 $ 713  
Shares, Outstanding         200 7,017,153  
Stockholders' Equity Attributable to Parent 23,355,687   226,934,775 (203,579,866) $ 1 $ 777  
Shares, Outstanding         200 7,675,682  
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 165,361   165,361        
Stock Issued During Period, Value, Restricted Stock Award, Gross   $ (1) 1        
Stock Issued During Period, Shares, Restricted Stock Award, Gross   19,512          
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent 65,874           $ 65,874
Net Income (Loss) Attributable to Parent (1,574,174)     (1,574,174)      
Net Income (Loss) Attributable to Parent (4,879,940)            
Stockholders' Equity Attributable to Parent 22,012,748   227,100,135 (205,154,040) $ 1 $ 778 65,874
Shares, Outstanding         200 7,695,194  
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 132,745   132,745        
Stock Issued During Period, Shares, New Issues   725,291          
Stock Issued During Period, Value, New Issues 691,405 $ 73 691,332        
Stock Issued During Period, Shares, Employee Stock Purchase Plans   10,526          
Stock Issued During Period, Value, Employee Stock Purchase Plan 8,715 $ 1 8,714        
Stock Issued During Period, Value, Restricted Stock Award, Gross   $ (6) 6        
Stock Issued During Period, Shares, Restricted Stock Award, Gross   72,121          
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent 102,847           102,847
Net Income (Loss) Attributable to Parent (1,537,029)     (1,537,029)      
Stockholders' Equity Attributable to Parent 21,411,431   227,932,920 (206,691,069) $ 1 $ 858 168,721
Shares, Outstanding         200 8,503,132  
APIC, Share-based Payment Arrangement, Increase for Cost Recognition 221,268   221,268        
Stock Issued During Period, Shares, New Issues   1,470          
Stock Issued During Period, Value, New Issues 1,426   1,426        
Stock Issued During Period, Value, Restricted Stock Award, Gross   $ (1) 1        
Stock Issued During Period, Shares, Restricted Stock Award, Gross   22,561          
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent 204,931           204,931
Net Income (Loss) Attributable to Parent (1,768,737)     (1,768,737)      
Stockholders' Equity Attributable to Parent $ 19,903,536   $ 228,155,613 $ (208,459,806) $ 1 $ 859 $ 206,869
Shares, Outstanding         200 8,527,163  
v3.23.3
Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Statement of Cash Flows [Abstract]    
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest $ (4,879,940) $ (3,724,739)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 30,957 39,170
Stock-based compensation 519,374 308,923
CompensationObligationSettlement 0 26,019
Inventory Write-down 63,420 0
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property 0 (6,875)
Investment Income, Net, Amortization of Discount and Premium 135,293 133,278
Debt Securities, Available-for-Sale, Realized Gain (166,783) 0
Changes in operating assets and liabilities:    
Accounts receivable 32,390 (391,641)
Inventories (115,042) (350,686)
Prepaid expenses and other current and long-term assets (197,404) (383,310)
Accounts payable (142,608) 255,343
Accrued expenses and compensation 356,562 540,902
Net Cash Provided by (Used in) Operating Activities (4,634,367) (3,806,422)
Payments to Acquire Held-to-maturity Securities 0 (18,921,376)
Payments to Acquire Debt Securities, Available-for-Sale (22,898,470) 0
Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities 17,000,000 0
Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale 7,095,000 0
Cash flows from investing activities:    
Purchases of fixed assets (138,176) (23,182)
Net Cash Provided by (Used in) Investing Activities 1,058,354 (18,944,558)
Cash flows from financing activities:    
Net proceeds from issuance of stock and warrants 701,546 1,950,881
Net Cash Provided by (Used in) Financing Activities 701,546 1,950,881
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect (2,874,467) (20,800,099)
Cash and cash equivalents, end of period 1,460,553  
Supplemental disclosure of cash flow information:    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 1,460,553 $ 1,772,005
v3.23.3
Business and Basis of Presentation
 9 Months Ended
Sep. 30, 2023
Accounting Policies [Abstract]  
Business and Basis of Presentation Business and Basis of Presentation
Our Business-An Overview
 
NeuroMetrix, Inc. (the "Company" or "NeuroMetrix") develops and commercializes health care products that utilize non-invasive neurostimulation. Revenues are derived from the sale of medical devices and after-market consumable products and accessories. The Company’s products are sold in the United States and select overseas markets. They are cleared by the U.S. Food and Drug Administration ("FDA") and regulators in foreign jurisdictions where appropriate. The Company has two primary products. DPNCheck® is a point-of-care test for diabetic peripheral neuropathy, which is the most common long-term complication of Type 2 diabetes. Quell is an app-enabled, wearable device for lower extremity chronic pain and for the symptoms of fibromyalgia.

The Company held cash, cash equivalents and securities totaling $17.6 million as of September 30, 2023. The Company believes that its present balance of cash resources and securities coupled with cash inflows from product sales will enable the Company to fund its operations for at least the next twelve months from the date of issuance of the financial statements. Actual cash requirements could differ from management's projections for many reasons, including changes the Company may make to its business strategy, commercial challenges, regulatory developments, changes to research and development programs, supply chain issues, staffing challenges and other items affecting the Company's projected uses of cash.

Unaudited Interim Financial Statements
 
The accompanying unaudited financial statements as of September 30, 2023 have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. The accompanying balance sheet as of December 31, 2022 has been derived from the audited balance sheet as of December 31, 2022 included in the Company's Form 10-K referenced below and does not include all disclosures required by GAAP. In the opinion of management, the financial statements include all normal and recurring adjustments considered necessary for a fair presentation of the Company’s financial position and operating results. Operating results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023 or any other period. These financial statements and notes should be read in conjunction with the financial statements for the year ended December 31, 2022 included in the Company’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission, (the "SEC"), on March 22, 2023 (File No. 001-33351).

Prior period reclassifications

We classify money market funds within cash and cash equivalents. Money market funds in the amount of $81,751 which were reported within held-to-maturity ("HTM") securities at December 31, 2022 have been reclassified into cash and cash equivalents to conform with the current presentation.
 
Revenues

Revenues include product sales, net of estimated returns. Revenue is measured as the amount of consideration the Company expects to receive in exchange for product transferred. Revenue is recognized at the point in time when contractual performance obligations have been satisfied and control of the product has been transferred to the customer. The Company typically has a single product delivery performance obligation. Accrued product returns using the most likely amount method are estimated based on historical data and evaluation of current information and variable consideration is not constrained.

Accounts receivable are recorded at the amount the Company expects to collect, net of the allowance for doubtful accounts receivable. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses based on customer past payment history, product usage activity, recent customer communications and, if appropriate, assessment of the future credit losses for receivables with similar characteristics. Individual customer balances which are over 60 days past due are reviewed individually for collectability. The Company does not have any off-balance sheet credit exposure related to its customers. Allowance for doubtful accounts was $25,000 as of September 30, 2023 and December 31, 2022.
 
In the quarters ended September 30, 2023 and 2022, two customers accounted for 28% and 13% of total revenues during 2023, and two customers accounted for 22% and 10% of total revenues during 2022. In the nine-month periods ended September 30, 2023 and 2022, two customers accounted for 26% and 10% of revenues during 2023 and one customer accounted for 34% of revenues during 2022. As of September 30, 2023, three customers represented 32%, 26% and 12% of receivables and two customers represented 17% and 14% of receivables as of December 31, 2022.

Cash and Cash Equivalents

Cash and cash equivalents include bank demand deposits and money market funds that invest primarily in U.S. government securities.

Securities

The Company invests in highly liquid, marketable debt securities with high credit ratings and typically with maturities of two years or less. Individual securities are designated by the Company as either HTM or “available-for-sale” ("AFS") at the point of investment. Securities classified as short-term have maturities of less than one year. As of September 30, 2023, all marketable securities held by the Company are classified as available for sale and had remaining contractual maturities of one year or less.

HTM securities are valued on an amortized cost basis and reviewed to determine if an allowance for credit losses should be recorded in the statements of operations. AFS securities are valued at fair value. Unrealized gains and losses on AFS securities are included as a component of accumulated other comprehensive income in the balance sheets and statements of stockholders’ equity and a component of total comprehensive loss in the statements of comprehensive income loss. An AFS security is impaired if its fair value is less than amortized cost. Unrealized losses are evaluated to determine if the impairment is credit-related or non credit-related. Credit-related impairment is recognized as an allowance on the balance sheet with a corresponding adjustment to earnings, and a non credit-related impairment is recognized in other comprehensive income (loss). For certain types of securities, such as U.S. Treasuries, the Company generally expects zero credit losses. No allowance for credit losses was recorded on its securities portfolio as of September 30, 2023.

Fair Value

The Company follows the provisions of Financial Accounting Standards Board (the "FASB") Accounting Standards Codification ("ASC") Topic 820-10, Fair Value Measurements and Disclosures ("ASC 820-10"), which defines fair value, establishes a framework for measuring fair value in GAAP and requires certain disclosures about fair value measurements. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability.

As a basis for considering such assumptions, ASC 820-10 established a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows: Level 1 observable inputs such as quoted prices in active markets; Level 2 inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3 unobservable inputs for which there are little or no market data, which require the Company to develop its own assumptions. The hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value (See Note 5).

Use of Estimates
 
The preparation of financial statements in conformity with GAAP requires management to make significant estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during reporting periods. Actual results could differ from those estimates.
Recent Accounting Pronouncements

Accounting Standards Updates ("ASUs") issued by the FASB are evaluated for their applicability. ASUs not included in the disclosures in this report were assessed and determined to be either not applicable or not expected to have a material impact on our financial statements.

Recently adopted accounting pronouncement

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments. The guidance in ASU 2016-13 replaces the incurred loss impairment methodology under current GAAP. The new impairment requires immediate recognition of estimated credit losses expected to occur for most financial assets and certain other instruments. It applies to all entities. For trade receivables, loans and HTM debt securities, entities are required to estimate lifetime expected credit losses. Trading and AFS debt securities are required to be recorded at fair value. SEC small reporting companies were required to adopt this new guidance in fiscal years beginning on or after December 15, 2022. The Company adopted this guidance on a prospective basis as of January 1, 2023 and had no material impact on the financial statements.
v3.23.3
Comprehensive Loss
 9 Months Ended
Sep. 30, 2023
Equity [Abstract]  
Comprehensive Loss Comprehensive Loss
 
For the quarter and nine months ended September 30, 2023, the Company had comprehensive income of 38,148 and 206,869, respectively for net unrealized gains on AFS securities, in addition to net loss in the statement of operations. There were no components of comprehensive income (loss) for the quarter and nine months ended September 30, 2022 other than net loss itself.
v3.23.3
Net Loss Per Common Share
 9 Months Ended
Sep. 30, 2023
Earnings Per Share [Abstract]  
Net Loss Per Common Share Net Loss Per Common Share
 
Basic and dilutive net loss per common share were as follows:
Quarters Ended September 30,Nine Months Ended September 30,
2023202220232022
Net loss applicable to common stockholders$(1,768,737)$(1,606,254)$(4,879,940)$(3,724,739)
Weighted average number of common shares outstanding, basic and dilutive8,520,025 7,011,438 8,034,711 6,962,732 
Net loss per common share applicable to common stockholders, basic and diluted$(0.21)$(0.23)$(0.61)$(0.53)

Shares underlying the following securities were excluded from the calculation of diluted net loss per common share because their effect was anti-dilutive for each of the periods presented: 
September 30,
 20232022
Options520,299 525,468 
Unvested restricted stock awards61,292 106,550 
Unvested restricted stock units301,647 207,233 
Convertible preferred stock62 62 
Total883,300 839,313 
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Quarters Ended September 30,Nine Months Ended September 30,
2023202220232022
Net loss applicable to common stockholders$(1,768,737)$(1,606,254)$(4,879,940)$(3,724,739)
Weighted average number of common shares outstanding, basic and dilutive8,520,025 7,011,438 8,034,711 6,962,732 
Net loss per common share applicable to common stockholders, basic and diluted$(0.21)$(0.23)$(0.61)$(0.53)
v3.23.3
Fair Value Measurements
 9 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurements Fair Value Measurements
 
The following tables set forth the Company’s financial instruments that were measured at fair value:

  September 30, 2023
 Total Level 1Level 2Level 3
Assets:    
Money market funds$827,002 $827,002 $— $— 
U.S. government bonds4,447,930 4,447,930 — — 
Commercial paper 11,729,192 — 11,729,192 — 
Total$17,004,124 $5,274,932 $11,729,192 $— 
 
  
 December 31, 2022
 Total Level 1 Level 2 Level 3
Assets:    
Money market funds$1,551,027 $1,551,027 $— $— 
Total$1,551,027 $1,551,027 $— $— 
The Company's accounts receivable, accounts payable, and accrued expenses are valued at cost which approximates fair value.
v3.23.3
Inventories
 9 Months Ended
Sep. 30, 2023
Inventory Disclosure [Abstract]  
Inventories Inventories
 
Inventories consist of the following: 
 September 30, 2023December 31, 2022
Purchased components$1,245,623 $982,129 
Finished goods420,986 632,858 
 $1,666,609 $1,614,987 
The company recorded a charge of $63,420 in the nine months ended September 30, 2023 to reduce the carrying value of inventory to net realizable value.
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure
4. Securities

The Company's marketable debt securities are classified as either AFS or HTM pursuant to ASC 320 - Investments - Debt Securities. The following table summarizes the valuations and unrealized gains and losses of AFS securities which are recorded at estimated fair value as of September 30, 2023. The Company held no AFS securities as of December 31, 2022.
 September 30, 2023
Gross Unrealized
Available-for-sale securitiesCost GainsLossesCredit LossesEstimated Fair Value
U.S. government bonds$4,393,086 $54,844 $— $— $4,447,930 
Commercial paper11,577,167 152,025 — — 11,729,192 
Total $15,970,253 $206,869 $— $— $16,177,122 

HTM securities are valued at amortized cost. The Company held no HTM securities as of September 30, 2023. The following tables summarize the valuations of HTM securities as of December 31, 2022.
 December 31, 2022
Held-to-maturity securitiesAmortized Cost Credit LossesEstimated Fair Value
U.S. government bonds$3,457,651 $— $3,456,580 
Corporate bonds4,011,569 — 3,950,380 
Commercial paper9,395,487 — 9,387,914 
Total $16,864,707 $— $16,794,874 
The Company evaluates all HTM and AFS securities for impairment at each reporting period. It determined that changes in the fair value of its securities at September 30, 2023 resulted primarily from interest rate fluctuations subsequent to the purchase date of the securities. There was no deterioration in the credit worthiness of the issuers and no credit losses were recorded as of September 30, 2023.
v3.23.3
Accrued Expenses
 9 Months Ended
Sep. 30, 2023
Payables and Accruals [Abstract]  
Accrued Expenses Accrued Expenses and Compensation
  
Accrued expenses and compensation consist of the following:
 September 30, 2023December 31, 2022
Professional services$335,201 $155,000 
Compensation329,559 249,224 
Clinical $43,524 $— 
Warranty 10,300 16,700 
Sales tax 128,986 131,621 
Other38,931 37,394 
 $886,501 $589,939 
v3.23.3
Leases Leases (Notes)
 9 Months Ended
Sep. 30, 2023
Leases [Abstract]  
Lessee, Operating Leases [Text Block] Operating Leases
 
The Company's lease on its Woburn, Massachusetts corporate office and manufacturing facility extends through September 2025 with a monthly base rent of $13,846 and a 5-year extension option. The Company's lease on its former corporate office in Waltham, Massachusetts (the "Waltham Lease") expired in February 2022. In the first quarter of 2022, a $60,000 reduction in rent expense was recorded upon return of the facility to the lessor. The letter of credit issued by a bank in favor of the Waltham facility was released. For the six months ended June 30, 2022, the Company recorded sublet income on the Waltham Lease totaling $22,795 within operating expenses on the Company's Statement of Operations.

Future minimum lease payments under this non-cancellable operating lease as of September 30, 2023 are as follows:
202341,446 
2024165,785 
2025117,431 
Total minimum lease payments$324,662 
Discount rate, 15%
$53,401 
Lease obligation, current portion148,391 
Lease obligation, net of current portion122,870 
$324,662 

Total recorded rent expense was $49,232 and $46,102, for the quarters ended September 30, 2023 and 2022, respectively. Total recorded rent expense was $147,696 and $116,959 for the nine months ended September 30, 2023 and 2022, respectively. The Company records rent expense on its facility lease on a straight-line basis over the lease term. The remaining operating lease term was two years as of September 30, 2023.
v3.23.3
Stockholders' Equity
 9 Months Ended
Sep. 30, 2023
Equity [Abstract]  
Stockholders' Equity Stockholders’ Equity
 
Preferred stock and convertible preferred stock consist of the following: 
 September 30, 2023December 31, 2022
Preferred stock, $0.001 par value; 5,000,000 shares authorized at September 30, 2023 and December 31, 2022; no shares issued and outstanding at September 30, 2023 and December 31, 2022
$— $— 
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at September 30, 2023 and December 31, 2022; 200 shares issued and outstanding at September 30, 2023 and December 31, 2022
$1 $1 

2023 Equity Activity

In May 2023, the Company issued 12,500 restricted stock units under its 2022 Equity Incentive Plan with a value of $12,625.

In June 2023, the Company issued 725,291 shares of its common stock, under an at-the-market ("ATM") program for net proceeds of $691,405 and issued 10,526 shares of fully vested common stock with a value of $8,715 pursuant to the Company's Employee Stock Purchase Plan.

In July 2023, the Company issued 1,470 shares of its common stock, under ATM program for net proceeds of $1,426 and issued 24,500 restricted stock units under its 2004 Stock Option Plan with a value of $22,883.

In August 2023, the Company issued 172,660 restricted stock units with a value of $240,000 as long term incentives ("LTI") to its directors under its 2022 Equity Incentive Plan.

As of September 30, 2023, the Company has 61,292 restricted stock awards and 301,647 restricted stock units that remain unvested. At December 31, 2022, the Company had 96,250 restricted stock awards and 194,731 restricted stock units that were unvested.

2022 Equity Activity

In January 2022, the Company issued 292,500 shares of common stock under an ATM equity offering program with net proceeds of $1,943,052 and issued 20,000 restricted stock awards under its 2004 Stock Option Plan with a value of $104,200.

In April 2022, the Company issued 76,000 shares of restricted common stock under its 2022 Equity Incentive Plan with a value of $326,000 to employees as LTI and issued 50,213 shares of fully vested common stock with a value of $215,417 in settlement of management incentive compensation.

In May 2022, the Company issued 161,764 restricted stock units with a value of $550,000 as LTI to its management and directors under its 2022 Equity Incentive Plan.

In June 2022, the Company issued 2,503 shares of fully vested common stock with a value of $7,829 pursuant to the Company's Employee Stock Purchase Plan.
For the quarter ended September 30, 2022, the Company issued 57,972 restricted stock units with a value of $202,008 under its 2022 Equity Incentive Plan.
v3.23.3
Business and Basis of Presentation (Policies)
 9 Months Ended
Sep. 30, 2023
Accounting Policies [Abstract]  
Unaudited Interim Financial Statements
Unaudited Interim Financial Statements
 
The accompanying unaudited financial statements as of September 30, 2023 have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. The accompanying balance sheet as of December 31, 2022 has been derived from the audited balance sheet as of December 31, 2022 included in the Company's Form 10-K referenced below and does not include all disclosures required by GAAP. In the opinion of management, the financial statements include all normal and recurring adjustments considered necessary for a fair presentation of the Company’s financial position and operating results. Operating results for the three and nine months ended September 30, 2023 are not necessarily indicative of the results that may be expected for the year ending December 31, 2023 or any other period. These financial statements and notes should be read in conjunction with the financial statements for the year ended December 31, 2022 included in the Company’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission, (the "SEC"), on March 22, 2023 (File No. 001-33351).

Prior period reclassifications
We classify money market funds within cash and cash equivalents. Money market funds in the amount of $81,751 which were reported within held-to-maturity ("HTM") securities at December 31, 2022 have been reclassified into cash and cash equivalents to conform with the current presentation.
Revenues
Revenues

Revenues include product sales, net of estimated returns. Revenue is measured as the amount of consideration the Company expects to receive in exchange for product transferred. Revenue is recognized at the point in time when contractual performance obligations have been satisfied and control of the product has been transferred to the customer. The Company typically has a single product delivery performance obligation. Accrued product returns using the most likely amount method are estimated based on historical data and evaluation of current information and variable consideration is not constrained.

Accounts receivable are recorded at the amount the Company expects to collect, net of the allowance for doubtful accounts receivable. The allowance for doubtful accounts is the Company’s best estimate of the amount of probable credit losses based on customer past payment history, product usage activity, recent customer communications and, if appropriate, assessment of the future credit losses for receivables with similar characteristics. Individual customer balances which are over 60 days past due are reviewed individually for collectability. The Company does not have any off-balance sheet credit exposure related to its customers. Allowance for doubtful accounts was $25,000 as of September 30, 2023 and December 31, 2022.
 In the quarters ended September 30, 2023 and 2022, two customers accounted for 28% and 13% of total revenues during 2023, and two customers accounted for 22% and 10% of total revenues during 2022. In the nine-month periods ended September 30, 2023 and 2022, two customers accounted for 26% and 10% of revenues during 2023 and one customer accounted for 34% of revenues during 2022. As of September 30, 2023, three customers represented 32%, 26% and 12% of receivables and two customers represented 17% and 14% of receivables as of December 31, 2022.
Cash and Cash Equivalents, Policy
Cash and Cash Equivalents

Cash and cash equivalents include bank demand deposits and money market funds that invest primarily in U.S. government securities.
Marketable Securities, Policy
Securities

The Company invests in highly liquid, marketable debt securities with high credit ratings and typically with maturities of two years or less. Individual securities are designated by the Company as either HTM or “available-for-sale” ("AFS") at the point of investment. Securities classified as short-term have maturities of less than one year. As of September 30, 2023, all marketable securities held by the Company are classified as available for sale and had remaining contractual maturities of one year or less.

HTM securities are valued on an amortized cost basis and reviewed to determine if an allowance for credit losses should be recorded in the statements of operations. AFS securities are valued at fair value. Unrealized gains and losses on AFS securities are included as a component of accumulated other comprehensive income in the balance sheets and statements of stockholders’ equity and a component of total comprehensive loss in the statements of comprehensive income loss. An AFS security is impaired if its fair value is less than amortized cost. Unrealized losses are evaluated to determine if the impairment is credit-related or non credit-related. Credit-related impairment is recognized as an allowance on the balance sheet with a corresponding adjustment to earnings, and a non credit-related impairment is recognized in other comprehensive income (loss). For certain types of securities, such as U.S. Treasuries, the Company generally expects zero credit losses. No allowance for credit losses was recorded on its securities portfolio as of September 30, 2023.
Fair Value Measurement, Policy
Fair Value

The Company follows the provisions of Financial Accounting Standards Board (the "FASB") Accounting Standards Codification ("ASC") Topic 820-10, Fair Value Measurements and Disclosures ("ASC 820-10"), which defines fair value, establishes a framework for measuring fair value in GAAP and requires certain disclosures about fair value measurements. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability.
As a basis for considering such assumptions, ASC 820-10 established a three-tier fair value hierarchy which prioritizes the inputs used in measuring fair value as follows: Level 1 observable inputs such as quoted prices in active markets; Level 2 inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3 unobservable inputs for which there are little or no market data, which require the Company to develop its own assumptions. The hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value (See Note 5).
Use of Estimates
Use of Estimates
 
The preparation of financial statements in conformity with GAAP requires management to make significant estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during reporting periods. Actual results could differ from those estimates.
New Accounting Pronouncements, Policy
Recent Accounting Pronouncements

Accounting Standards Updates ("ASUs") issued by the FASB are evaluated for their applicability. ASUs not included in the disclosures in this report were assessed and determined to be either not applicable or not expected to have a material impact on our financial statements.

Recently adopted accounting pronouncement

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments. The guidance in ASU 2016-13 replaces the incurred loss impairment methodology under current GAAP. The new impairment requires immediate recognition of estimated credit losses expected to occur for most financial assets and certain other instruments. It applies to all entities. For trade receivables, loans and HTM debt securities, entities are required to estimate lifetime expected credit losses. Trading and AFS debt securities are required to be recorded at fair value. SEC small reporting companies were required to adopt this new guidance in fiscal years beginning on or after December 15, 2022. The Company adopted this guidance on a prospective basis as of January 1, 2023 and had no material impact on the financial statements.
v3.23.3
Net Loss Per Common Share (Tables)
 9 Months Ended
Sep. 30, 2023
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Quarters Ended September 30,Nine Months Ended September 30,
2023202220232022
Net loss applicable to common stockholders$(1,768,737)$(1,606,254)$(4,879,940)$(3,724,739)
Weighted average number of common shares outstanding, basic and dilutive8,520,025 7,011,438 8,034,711 6,962,732 
Net loss per common share applicable to common stockholders, basic and diluted$(0.21)$(0.23)$(0.61)$(0.53)
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
September 30,
 20232022
Options520,299 525,468 
Unvested restricted stock awards61,292 106,550 
Unvested restricted stock units301,647 207,233 
Convertible preferred stock62 62 
Total883,300 839,313 
v3.23.3
Investments, Debt and Equity Securities (Tables)
 9 Months Ended
Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-for-Sale Securities Reconciliation
 September 30, 2023
Gross Unrealized
Available-for-sale securitiesCost GainsLossesCredit LossesEstimated Fair Value
U.S. government bonds$4,393,086 $54,844 $— $— $4,447,930 
Commercial paper11,577,167 152,025 — — 11,729,192 
Total $15,970,253 $206,869 $— $— $16,177,122 
Debt Securities, Held-to-Maturity, Allowance for Credit Loss
 December 31, 2022
Held-to-maturity securitiesAmortized Cost Credit LossesEstimated Fair Value
U.S. government bonds$3,457,651 $— $3,456,580 
Corporate bonds4,011,569 — 3,950,380 
Commercial paper9,395,487 — 9,387,914 
Total $16,864,707 $— $16,794,874 
v3.23.3
Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Assets and Liabilities Measured at Fair Value on Recurring Basis
  September 30, 2023
 Total Level 1Level 2Level 3
Assets:    
Money market funds$827,002 $827,002 $— $— 
U.S. government bonds4,447,930 4,447,930 — — 
Commercial paper 11,729,192 — 11,729,192 — 
Total$17,004,124 $5,274,932 $11,729,192 $— 
 
  
 December 31, 2022
 Total Level 1 Level 2 Level 3
Assets:    
Money market funds$1,551,027 $1,551,027 $— $— 
Total$1,551,027 $1,551,027 $— $— 
v3.23.3
Inventories (Tables)
 9 Months Ended
Sep. 30, 2023
Inventory Disclosure [Abstract]  
Schedule of Inventory Inventories consist of the following: 
 September 30, 2023December 31, 2022
Purchased components$1,245,623 $982,129 
Finished goods420,986 632,858 
 $1,666,609 $1,614,987 
v3.23.3
Accrued Expenses (Tables)
 9 Months Ended
Sep. 30, 2023
Payables and Accruals [Abstract]  
Schedule of Accrued Expenses
Accrued expenses and compensation consist of the following:
 September 30, 2023December 31, 2022
Professional services$335,201 $155,000 
Compensation329,559 249,224 
Clinical $43,524 $— 
Warranty 10,300 16,700 
Sales tax 128,986 131,621 
Other38,931 37,394 
 $886,501 $589,939 
v3.23.3
Leases Leases (Tables)
 9 Months Ended
Sep. 30, 2023
Leases [Abstract]  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
202341,446 
2024165,785 
2025117,431 
Total minimum lease payments$324,662 
Discount rate, 15%
$53,401 
Lease obligation, current portion148,391 
Lease obligation, net of current portion122,870 
$324,662 
v3.23.3
Statement of Shareholders' Equity (Tables)
 9 Months Ended
Sep. 30, 2023
Equity [Abstract]  
Schedule of Stock by Class [Table Text Block]
Preferred stock and convertible preferred stock consist of the following: 
 September 30, 2023December 31, 2022
Preferred stock, $0.001 par value; 5,000,000 shares authorized at September 30, 2023 and December 31, 2022; no shares issued and outstanding at September 30, 2023 and December 31, 2022
$— $— 
Series B convertible preferred stock, $0.001 par value; 147,000 shares designated at September 30, 2023 and December 31, 2022; 200 shares issued and outstanding at September 30, 2023 and December 31, 2022
$1 $1 
v3.23.3
Business and Basis of Presentation (Detail) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Jun. 30, 2023
Mar. 31, 2023
Jan. 01, 2023
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Organization And Basis Of Presentation [Line Items]                      
Accounts receivable, net $ 614,381   $ 614,381   $ 646,771            
Net proceeds from issuance of stock and warrants     701,546 $ 1,950,881              
Accumulated deficit 208,459,806   208,459,806   203,579,866            
Cash and cash equivalents 1,460,553   1,460,553   4,335,020            
Prepaid expenses and other current assets (786,978)   (786,978)   (645,502)            
Assets, Current (20,705,643)   (20,705,643)   (24,106,987)            
Liabilities, Current (1,260,366)   (1,260,366)   (1,106,412)            
Operating Lease, Liability, Noncurrent (122,870)   (122,870)   (207,516)            
Stockholders' Equity Attributable to Parent 19,903,536 $ 21,966,268 19,903,536 21,966,268 23,355,687 $ 21,411,431 $ 22,012,748   $ 23,410,571 $ 24,237,908 $ 23,215,786
Cost of revenues 421,382 693,571 1,484,240 1,888,566              
Gross Profit 781,782 $ 1,274,432 3,099,439 $ 4,520,129              
Operating Lease, Right-of-Use Asset (281,891)   (281,891)   (370,609)            
Assets (21,286,772)   (21,286,772)   (24,669,615)            
Accrued Liabilities, Current (886,501)   (886,501)   (589,939)            
Liabilities (1,383,236)   (1,383,236)   (1,313,928)            
Allowance for doubtful accounts 25,000   25,000   25,000            
Cash, Cash Equivalents, and Short-term Investments 17,600,000   17,600,000                
Debt Securities, Held-to-maturity, Fair Value         $ 16,794,874            
Accounting Standards Update 2016-13                      
Organization And Basis Of Presentation [Line Items]                      
Change in Accounting Principle, Accounting Standards Update, Adopted [true false]               true      
Change in Accounting Principle, Accounting Standards Update, Adoption Date               Jan. 01, 2023      
From Held To Maturity Securities | Money Market Funds                      
Organization And Basis Of Presentation [Line Items]                      
Cash and cash equivalents $ 81,751   $ 81,751                
Customer One | Revenue | Customer Concentration Risk                      
Organization And Basis Of Presentation [Line Items]                      
Concentration risk, percentage 28.00% 22.00% 26.00% 34.00%              
Customer One | Accounts Receivable | Customer Concentration Risk                      
Organization And Basis Of Presentation [Line Items]                      
Concentration risk, percentage     32.00%   17.00%            
Customer Two | Revenue | Customer Concentration Risk                      
Organization And Basis Of Presentation [Line Items]                      
Concentration risk, percentage 13.00% 10.00% 10.00%                
Customer Two | Accounts Receivable | Customer Concentration Risk                      
Organization And Basis Of Presentation [Line Items]                      
Concentration risk, percentage     26.00%   14.00%            
Customer Three | Accounts Receivable | Customer Concentration Risk                      
Organization And Basis Of Presentation [Line Items]                      
Concentration risk, percentage     12.00%                
v3.23.3
Comprehensive Loss (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Equity [Abstract]            
Other Comprehensive Income (Loss), Net of Tax $ 38,148     $ 0 $ 206,869 $ 0
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent $ 204,931 $ 102,847 $ 65,874      
v3.23.3
Net Loss Per Common Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total antidilutive securities excluded from the computation of earnings per share (in shares) 883,300 839,313
Convertible preferred stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total antidilutive securities excluded from the computation of earnings per share (in shares) 62 62
Options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total antidilutive securities excluded from the computation of earnings per share (in shares) 520,299 525,468
Restricted Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total antidilutive securities excluded from the computation of earnings per share (in shares) 61,292 106,550
Restricted Stock Units (RSUs)    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Total antidilutive securities excluded from the computation of earnings per share (in shares) 301,647 207,233
v3.23.3
Net Loss Per Common Share Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Earnings Per Share [Abstract]                
Net Income (Loss) Attributable to Parent $ (1,768,737) $ (1,537,029) $ (1,574,174) $ (1,606,254) $ (1,159,923) $ (958,562) $ (4,879,940) $ (3,724,739)
Weighted Average Number of Shares Outstanding, Basic 8,520,025     7,011,438     8,034,711 6,962,732
Weighted Average Number of Shares Outstanding, Diluted 8,520,025     7,011,438     8,034,711 6,962,732
Earnings Per Share, Diluted $ (0.21)     $ (0.23)     $ (0.61) $ (0.53)
Earnings Per Share, Basic $ (0.21)     $ (0.23)     $ (0.61) $ (0.53)
v3.23.3
Investments, Debt and Equity Securities (Details) - AFS - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost $ 15,970,253  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 206,869  
Debt Securities, Available-for-Sale 16,177,122 $ 0
Debt Securities, Available-for-Sale, Allowance for Credit Loss 0  
Commercial Paper    
Debt Securities, Available-for-Sale [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 11,577,167  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 152,025  
Debt Securities, Available-for-Sale 11,729,192  
US Government Agencies Debt Securities    
Debt Securities, Available-for-Sale [Line Items]    
Debt Securities, Available-for-Sale, Amortized Cost 4,393,086  
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax 54,844  
Debt Securities, Available-for-Sale $ 4,447,930  
v3.23.3
Investments, Debt and Equity Securities (Details) - HTM - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Schedule of Held-to-Maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss $ 0 $ 16,864,707
Debt Securities, Held-to-maturity, Fair Value   16,794,874
Debt Securities, Held-to-Maturity, Allowance for Credit Loss $ 0  
US Government Agencies Debt Securities    
Schedule of Held-to-Maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss   3,457,651
Debt Securities, Held-to-maturity, Fair Value   3,456,580
Corporate Debt Securities    
Schedule of Held-to-Maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss   4,011,569
Debt Securities, Held-to-maturity, Fair Value   3,950,380
Commercial Paper    
Schedule of Held-to-Maturity Securities [Line Items]    
Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss   9,395,487
Debt Securities, Held-to-maturity, Fair Value   $ 9,387,914
v3.23.3
Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Assets    
Debt Securities, Available-for-Sale $ 16,177,122 $ 0
Assets, Fair Value Disclosure 17,004,124 1,551,027
Money Market Funds    
Assets    
Money market funds 827,002 1,551,027
US Government Agencies Debt Securities    
Assets    
Debt Securities, Available-for-Sale 4,447,930  
Commercial Paper    
Assets    
Debt Securities, Available-for-Sale 11,729,192  
Level 1    
Assets    
Assets, Fair Value Disclosure 5,274,932 1,551,027
Level 1 | Money Market Funds    
Assets    
Money market funds 827,002 $ 1,551,027
Level 1 | US Government Agencies Debt Securities    
Assets    
Debt Securities, Available-for-Sale 4,447,930  
Level 2    
Assets    
Assets, Fair Value Disclosure 11,729,192  
Level 2 | Commercial Paper    
Assets    
Debt Securities, Available-for-Sale $ 11,729,192  
v3.23.3
Inventories (Detail) - USD ($)
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Inventory [Line Items]      
Purchased components $ 1,245,623   $ 982,129
Finished goods 420,986   632,858
Inventories 1,666,609   $ 1,614,987
Inventory Write-down $ 63,420 $ 0  
v3.23.3
Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Payables and Accruals [Abstract]    
Professional services $ 335,201 $ 155,000
Accrued Salaries, Current 329,559 249,224
Accrued Consulting Current 43,524 0
Warranty reserve 10,300 16,700
Other 38,931 37,394
Sales and Excise Tax Payable, Current 128,986 131,621
Accrued expenses $ 886,501 $ 589,939
v3.23.3
Leases Leases (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended
Jun. 01, 2018
Sep. 30, 2023
Sep. 30, 2022
Mar. 31, 2022
Jun. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Operating Leased Assets [Line Items]                
Operating Lease, Weighted Average Discount Rate, Percent   15.00%       15.00%    
Operating Lease, Weighted Average Remaining Lease Term   2 years       2 years    
Operating Lease, Expense   $ 49,232 $ 46,102     $ 147,696 $ 116,959  
Operating Lease, Right-of-Use Asset   281,891       281,891   $ 370,609
Rent Expense Reduction       $ 60,000        
Sublease Income         $ 22,795      
Lessee, Operating Lease, Liability, to be Paid, Year One   41,446       41,446    
Lessee, Operating Lease, Liability, to be Paid, Year Three   165,785       165,785    
Lessee, Operating Lease, Liability, to be Paid, Year Four   117,431       117,431    
Lessee, Operating Lease, Liability, to be Paid   324,662       324,662    
Operating Lease Discount   53,401       53,401    
Operating Lease, Liability, Current   148,391       148,391   148,391
Operating Lease, Liability, Noncurrent   $ 122,870       $ 122,870   $ 207,516
Rent Expense Reduction       $ 60,000        
Sublease Income         $ 22,795      
Woburn Lease [Member]                
Operating Leased Assets [Line Items]                
Lessee, Operating Lease, Renewal Term 5 years              
Woburn Lease [Member] | MonthlyRent [Member]                
Operating Leased Assets [Line Items]                
Operating Lease, Payments $ 13,846              
v3.23.3
Stockholders' Equity - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2023
Jul. 31, 2023
Jun. 30, 2023
May 31, 2023
Oct. 19, 2022
Jun. 30, 2022
May 31, 2022
Apr. 30, 2022
Jan. 31, 2022
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Class of Stock [Line Items]                                    
Stock Issued During Period, Value, Employee Stock Purchase Plan     $ 8,715               $ 8,715     $ 7,829        
Net proceeds from issuance of stock and warrants                               $ 701,546 $ 1,950,881  
Common stock, par value (in dollars per share)                   $ 0.0001           $ 0.0001   $ 0.0001
Stock Issued During Period, Shares, Restricted Stock Award, Gross 172,660 24,500     12,500   161,764           57,972          
Stock Issued During Period, Value, Restricted Stock Award, Gross $ 240,000 $ 22,883   $ 12,625     $ 550,000           $ 202,008          
Stock Issued During Period, Value, New Issues                   $ 1,426 $ 691,405       $ 1,943,052      
Common Stock [Member]                                    
Class of Stock [Line Items]                                    
Stock Issued During Period, Shares, Employee Stock Purchase Plans     10,526     2,503         10,526     2,503        
Stock Issued During Period, Value, Employee Stock Purchase Plan           $ 7,829         $ 1              
Stock Issued During Period, Shares, New Issues                   1,470 725,291       292,500      
Stock Issued During Period, Shares, Restricted Stock Award, Gross               76,000 20,000 22,561 72,121 19,512 16,578 3,120 1,759      
Stock Issued During Period, Value, Restricted Stock Award, Gross               $ 326,000 $ 104,200 $ 1 $ 6 $ 1 $ 1 $ 7 $ 3      
Stock Issued During Period, Value, New Issues                     $ 73       $ 29      
Restricted Stock                                    
Class of Stock [Line Items]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number                   61,292           61,292   96,250
Restricted Stock Units (RSUs)                                    
Class of Stock [Line Items]                                    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number                   301,647           301,647   194,731
Management Incentive Compensation | Common Stock [Member]                                    
Class of Stock [Line Items]                                    
Stock Issued During Period, Shares, New Issues               50,213                    
Stock Issued During Period, Value, New Issues               $ 215,417                    
At The Market Offering Program [Member] | Common Stock [Member]                                    
Class of Stock [Line Items]                                    
Stock Issued During Period, Shares, New Issues   1,470 725,291           292,500                  
Proceeds from Issuance of Common Stock   $ 1,426 $ 691,405           $ 1,943,052                  
v3.23.3
Preferred Stock and Convertible Preferred Stock (Details) - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Preferred Non-Convertible Stock    
Class of Stock [Line Items]    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 0 0
Value of preferred stock issued $ 0 $ 0
Preferred stock, shares outstanding (in shares) 0 0
Series B Preferred Stock | Preferred Stock    
Class of Stock [Line Items]    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 147,000 147,000
Preferred stock, shares issued (in shares) 200 200
Value of preferred stock issued $ 1 $ 1
Preferred stock, shares outstanding (in shares) 200 200
v3.23.3
Label Element Value
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents $ 4,335,020
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents $ 22,572,104
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