respectively, which are included in general and administrative expense in our condensed consolidated statements of income. For the three months ended March 31, 2020, rent for the office lease was abated. For the three months ended March 31, 2019, approximately $22,000 was paid for our office lease and classified as operating activities in our condensed consolidated statements of cash flows.
As lessor for each of our real estate transactions involving the leaseback of the related property to the seller or affiliates of the seller, we determine whether these transactions qualify as sale and leaseback transactions under the accounting guidance. For these transactions, we consider various inputs and assumptions including, but not necessarily limited to, lease terms, renewal options, discount rates, and other rights and provisions in the purchase and sale agreement, lease and other documentation to determine whether control has been transferred to the Company or remains with the lessee. A transaction involving a sale leaseback will be treated as a purchase of a real estate property if it is considered to transfer control of the underlying asset from the lessee. A lease will be classified as direct-financing if risks and rewards are conveyed without the transfer of control. Otherwise, the lease is treated as an operating lease. These criteria also include estimates and assumptions regarding the fair value of the leased facilities, minimum lease payments, the economic useful life of the facilities, the existence of a purchase option, and certain other terms in the lease agreements. The lease accounting guidance requires accounting for a transaction as a financing in a sale leaseback when the seller-lessee is provided an option to purchase the property from the landlord at the tenant’s option. All of our leases are classified as operating leases. Our tenant reimbursable revenue and property expenses are presented on a gross basis as rental revenue and as property expenses, respectively, on our condensed consolidated statements of income.
One of our leases that was entered into prior to 2019 provides the lessee with a purchase option to purchase the leased property at the end of the initial lease term in September 2034, subject to the satisfaction of certain conditions. The purchase option provision allows the lessee to purchase the leased property at the greatest of (a) the fair value; (b) the value determined by dividing the then-current base rent by 8%; and (c) an amount equal to our gross investment in the property (including the purchase price at acquisition and any additional investment in the property made by us during the term of the lease), indexed to inflation. At March 31, 2020, our gross investment in the property with the purchase option was approximately $29.0 million. At March 31, 2020, the purchase option was not exercisable.
Our leases generally contain options to extend the lease terms at the prevailing market rate or at the expiring rental rate at the time of expiration. Certain of our leases provide the lessee with a right of first refusal or right of first offer in the event we market the leased property for sale.
Recent Accounting Pronouncements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments — Credit Losses, which changes the impairment model for most financial assets and certain other instruments. For trade and other receivables, held-to-maturity debt securities, loans and other instruments, companies will be required to use a new forward-looking “expected loss” model that generally will result in the earlier recognition of allowances for losses. In November 2018, the FASB issued ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments — Credit Losses, which among other updates, clarifies that receivables arising from operating leases are not within the scope of this guidance and should be evaluated in accordance with Topic 842. For available-for-sale debt securities with unrealized losses, companies will measure credit losses in a manner similar to what they do today, except that the losses will be recognized as allowances rather than as reductions in the amortized cost of the securities. These standards were effective for the Company on January 1, 2020, and did not have a material impact on our condensed consolidated financial statements.
Concentration of Credit Risk. As of March 31, 2020, we owned 53 properties located in Arizona, California, Colorado, Florida, Illinois, Maryland, Massachusetts, Michigan, Minnesota, Nevada, New York, North Dakota, Ohio, Pennsylvania and Virginia. The ability of any of our tenants to honor the terms of their leases is dependent upon the economic, regulatory, competition, natural and social factors affecting the community in which that tenant operates. During the three months ended March 31, 2020, PharmaCann, LLC (“PharmaCann”) leased five properties from us which comprised approximately 24% of rental revenues (including tenant reimbursements). During the three months ended March 31, 2019, PharmaCann leased two properties from us which comprised approximately 31% of rental revenues (including tenant reimbursements). In addition, during the three months ended March 31, 2020, Ascend Wellness Holdings, LLC’s leases at certain of our properties located in Illinois and Michigan accounted for approximately 9% of our rental revenues (including tenant reimbursements).
At March 31, 2020, we had a property in each of Florida, Illinois, Michigan, and Pennsylvania that individually accounted for approximately 5% of our net real estate held for investment. At December 31, 2019, one of our properties in New York accounted for approximately 6% of our net real estate held for investment.