Subsequent Events	12 Months Ended
Dec. 31, 2020
Subsequent Events
Subsequent Events	10. Subsequent Events At December 31, 2020 there were 17,999,999 October 2018 Warrants outstanding. On November 16, 2020, the exercise price of the October 2018 Warrants was reduced from $1.38 per October 2018 Warrant per full share of the Company’s common stock, $0.001 par value per share (the “Common Stock”), to $0.69 per Warrant per full share of Common Stock in accordance with the anti-dilution terms of the October 2018 Warrant. The reduction was the result of the automatic price adjustment provision of the October 2018 Warrant triggered by the issuance of shares of Common Stock by the Company through its “at the market offering” facility. During January and February 2021, 11,655,747 October 2018 Warrants were exercised for cash proceeds of $8.0 million. On January 27, 2021, the Company filed a Certificate of Amendment to the Certificate of Designation for its Series A Convertible Preferred Stock (the “Certificate of Amendment”) with the Secretary of State of the State of Nevada that adjusted the conversion price from $18.90 per share to $1.50 per share and removed the redemption upon change of control. The Company received notice from the holder of the Series A Preferred Stock that it was increasing the Maximum Percentage as defined in the “Certificate of Designation” from 4.99% to 9.99%, such increase to be effective 61 days from the date hereof. During January and February 2021, all outstanding shares of Series A Convertible Preferred Stock were converted to approximately 9.0 million shares of the Company’s common stock. There are no remaining shares of the Series A Convertible Preferred stock outstanding after these conversions. During January and February 2021, the Company issued 8,996,768 shares of its common stock upon the conversion effected on such date by a holder of 120,000 shares of its Series A Convertible Preferred Stock. On February 9, 2021, the Company entered into an amended and restated the sales agreement with B. Riley Securities, Inc. (“B. Riley”) and A.G.P./Alliance Global Partners (“AGP”) in order to include AGP as an additional sales agent for the Company’s “at the market offering” program (the “Amended and Restated Sales Agreement”). The Sales Agreement amended and restated the At Market Issuance Sales Agreement, dated August 5, 2016, with B. Riley Securities, Inc. (formerly known as B. Riley FBR, Inc.), as amended by amendment no. 1, dated May 7, 2018, to the At Market Issuance Sales Agreement. Subsequent to year end through March 3, 2021, the Company sold through the At Market Issuance Sales Agreement and the Amended and Restated Sales Agreement approximately 76.3 million shares of the Company’s common stock and received net proceeds of approximately $63.8 million.

10. Subsequent Events

At December 31, 2020 there were 17,999,999 October 2018 Warrants outstanding. On November 16, 2020, the exercise price of the October 2018 Warrants was reduced from $1.38 per October 2018 Warrant per full share of the Company’s common stock, $0.001 par value per share (the “Common Stock”), to $0.69 per Warrant per full share of Common Stock in accordance with the anti-dilution terms of the October 2018 Warrant. The reduction was the result of the automatic price adjustment provision of the October 2018 Warrant triggered by the issuance of shares of Common Stock by the Company through its “at the market offering” facility. During January and February 2021, 11,655,747 October 2018 Warrants were exercised for cash proceeds of $8.0 million.

On January 27, 2021, the Company filed a Certificate of Amendment to the Certificate of Designation for its Series A Convertible Preferred Stock (the “Certificate of Amendment”) with the Secretary of State of the State of Nevada that adjusted the conversion price from $18.90 per share to $1.50 per share and removed the redemption upon change of control. The Company received notice from the holder of the Series A Preferred Stock that it was increasing the Maximum Percentage as defined in the “Certificate of Designation” from 4.99% to 9.99%, such increase to be effective 61 days from the date hereof. During January and February 2021, all outstanding shares of Series A Convertible Preferred Stock were converted to approximately 9.0 million shares of the Company’s common stock. There are no remaining shares of the Series A Convertible Preferred stock outstanding after these conversions. During January and February 2021, the Company issued 8,996,768 shares of its common stock upon the conversion effected on such date by a holder of 120,000 shares of its Series A Convertible Preferred Stock.

On February 9, 2021, the Company entered into an amended and restated the sales agreement with B. Riley Securities, Inc. (“B. Riley”) and A.G.P./Alliance Global Partners (“AGP”) in order to include AGP as an additional sales agent for the Company’s “at the market offering” program (the “Amended and Restated Sales Agreement”). The Sales Agreement amended and restated the At Market Issuance Sales Agreement, dated August 5, 2016, with B. Riley Securities, Inc. (formerly known as B. Riley FBR, Inc.), as amended by amendment no. 1, dated May 7, 2018, to the At Market Issuance Sales Agreement.

Subsequent to year end through March 3, 2021, the Company sold through the At Market Issuance Sales Agreement and the Amended and Restated Sales Agreement approximately 76.3 million shares of the Company’s common stock and received net proceeds of approximately $63.8 million.