Subsequent Events	6 Months Ended
Jun. 30, 2020
Subsequent Events
Subsequent Events	10.Subsequent Events As previously disclosed, on June 24, 2015, the Company entered into a Controlled Equity OfferingSM Sales Agreement (the “Sales Agreement”) with Cantor Fitzgerald & Co. (“Cantor Fitzgerald”), pursuant to which the Company could offer and sell, at the Company’s option, shares of its common stock for aggregate gross sales proceeds of up to $25.0 million, from time to time, through an “at the market” equity offering program under which Cantor Fitzgerald acted as agent. On July 2, 2020, the Company delivered written notice to Cantor Fitzgerald that it had elected, pursuant to Section 12(b) of the Sales Agreement, to terminate the Sales Agreement effective as of July 12, 2020, ten (10) days after delivery of the notice. The Company did not incur any material early termination penalties in connection with the termination of the Sales Agreement. The Company did not sell any shares of common stock pursuant to the Sales Agreement. On July 13, 2020, the Company entered into an At-The-Market Offering Agreement (the “Offering Agreement“) with H. C. Wainwright & Co., LLC (“Wainwright”), as sales agent and/or principal, pursuant to which the Company may offer and sell, from time to time, through or to Wainwright, shares of the Company’s common stock. Sales of shares of common stock under the Offering Agreement will be made pursuant to the Company’s shelf registration statement on Form S-3 filed with the SEC, which was declared effective by the SEC on June 5, 2019 (File No. 333-231537), and a related prospectus supplement filed with the SEC on July 14, 2020, for an aggregate offering price of up to $7.0 million, provided that the Company may be limited in the amount of securities that it can sell under the Offering Agreement pursuant to Instruction I.B.6 to Form S-3 for so long as the Company’s public float remains less than $75.0 million. Under the Offering Agreement, Wainwright may sell shares by any method deemed to be an “at the market” offering as defined in Rule 415 under the Securities Act. The Company will pay Wainwright a commission of 3% of the aggregate gross proceeds from each sale of shares under the Offering Agreement and has agreed to provide Wainwright with customary indemnification and contribution rights. The Company has also agreed to reimburse Wainwright for certain specified expenses. To date, the Company has not offered or sold any shares of common stock under the Offering Agreement.

10.Subsequent Events

As previously disclosed, on June 24, 2015, the Company entered into a Controlled Equity OfferingSM Sales Agreement (the “Sales Agreement”) with Cantor Fitzgerald & Co. (“Cantor Fitzgerald”), pursuant to which the Company could offer and sell, at the Company’s option, shares of its common stock for aggregate gross sales proceeds of up to $25.0 million, from time to time, through an “at the market” equity offering program under which Cantor Fitzgerald acted as agent. On July 2, 2020, the Company delivered written notice to Cantor Fitzgerald that it had elected, pursuant to Section 12(b) of the Sales Agreement, to terminate the Sales Agreement effective as of July 12, 2020, ten (10) days after delivery of the notice. The Company did not incur any material early termination penalties in connection with the termination of the Sales Agreement. The Company did not sell any shares of common stock pursuant to the Sales Agreement.

On July 13, 2020, the Company entered into an At-The-Market Offering Agreement (the “Offering Agreement“) with H. C. Wainwright & Co., LLC (“Wainwright”), as sales agent and/or principal, pursuant to which the Company may offer and sell, from time to time, through or to Wainwright, shares of the Company’s common stock. Sales of shares of common stock under the Offering Agreement will be made pursuant to the Company’s shelf registration statement on Form S-3 filed with the SEC, which was declared effective by the SEC on June 5, 2019 (File No. 333-231537), and a related prospectus supplement filed with the SEC on July 14, 2020, for an aggregate offering price of up to $7.0 million, provided that the Company may be limited in the amount of securities that it can sell under the Offering Agreement pursuant to Instruction I.B.6 to Form S-3 for so long as the Company’s public float remains less than $75.0 million. Under the Offering Agreement, Wainwright may sell shares by any method deemed to be an “at the market” offering as defined in Rule 415 under the Securities Act. The Company will pay Wainwright a commission of 3% of the aggregate gross proceeds from each sale of shares under the Offering Agreement and has agreed to provide Wainwright with customary indemnification and contribution rights. The Company has also agreed to reimburse Wainwright for certain specified expenses. To date, the Company has not offered or sold any shares of common stock under the Offering Agreement.