Prospectus Filed Pursuant to Rule 424(b)(5) (424b5)
Filed Pursuant to Rule 424(b)(5)
Registration No. 333-226650
(To Prospectus Dated July 15, 2019)
This prospectus supplement supplements the prospectus dated
July 15, 2019 related to the offer and sale of shares of our
common stock, $0.001 par value per share, pursuant to a Capital on
Agreement, or the Sales Agreement, dated July 1, 2019, with
JonesTrading Institutional Services LLC, or JonesTrading, in “at
the market offering” as defined in Rule 415(a)(4) under the
Securities Act of 1933. As of the date of this prospectus
supplement, we have terminated the offer and sale of shares in
at-the-market offerings under
the sales agreement prospectus.
As of the date of this prospectus supplement, we had sold an
aggregate of 1,263,059 shares of our common stock under the Sales
Agreement for aggregate gross proceeds of $762,000.
Neither the Securities and Exchange Commission nor any state
securities commission has approved or disapproved of these
securities or passed upon the adequacy or accuracy of this
prospectus supplement or the accompanying prospectus. Any
representation to the contrary is a criminal offense.
The date of this prospectus supplement is
June 3, 2020.