6. Common Stock Offerings	3 Months Ended
Mar. 31, 2022
Business Combination and Asset Acquisition [Abstract]
6. Common Stock Offerings	6. Common Stock Offerings Public Offerings On May 24, 2021, the Company completed an underwritten public offering, pursuant to which the Company sold 22,258,066 shares of its common stock, at a price to the public of $3.10 per share, which included the exercise in full by the underwriter of its option to purchase up to 2,903,226 additional shares of common stock. The net proceeds to the Company from the offering were approximately $64.5 million, after deducting underwriting discounts, commissions and other offering expenses. The Company used $7.3 million of the net proceeds from the offering for the partial repayment of certain outstanding convertible promissory notes. On January 28, 2021, the Company completed an underwritten public offering, pursuant to which the Company sold 17,530,488 shares of its common stock, at a price to the public of $2.05 per share, which included the exercise in full by the underwriter of its option to purchase up to 2,286,585 additional shares of common stock. The net proceeds to the Company from the offering were approximately $33.5 million, after deducting underwriting discounts, commissions and other offering expenses. The Company used $3.8 million of the net proceeds from the offering for the partial repayment of certain outstanding convertible promissory notes. Stock Purchase Agreement with iX Biopharma Europe Limited On November 24, 2021, the Company entered in an exclusive license agreement and stock purchase agreement (the “iXBEL Stock Purchase Agreement”) with iX Biopharma Europe Limited (“iXBEL”). As consideration for the license under the license agreement, the Company paid iXBEL an upfront fee of $9.0 million, comprised of $3.5 million in cash and 2,570,266 restricted shares of the Company’s common stock. Pursuant to the iXBEL Stock Purchase Agreement, the Company agreed to reimburse iXBEL for the difference in value (the “Shortfall Amount”) in the event the aggregate value of the 2,570,266 shares of the Company’s common stock at the time of registration and issuance was less than $5.5 million. The initial fair value of this Shortfall Amount was $0.8 million and in January 2022, the Company settled the Shortfall Amount by the payment of $1.2 million in cash to iXBEL. The change in fair value of the Shortfall Amount is included in Change in fair value of derivative liability on the Condensed Consolidated Statement of Operations and Comprehensive Loss (see Note 4).

6. Common Stock Offerings

3 Months Ended

Mar. 31, 2022

Business Combination and Asset Acquisition [Abstract]

Public Offerings

On May 24, 2021, the Company completed an underwritten public offering, pursuant to which the Company sold 22,258,066 shares of its common stock, at a price to the public of $3.10 per share, which included the exercise in full by the underwriter of its option to purchase up to 2,903,226 additional shares of common stock. The net proceeds to the Company from the offering were approximately $64.5 million, after deducting underwriting discounts, commissions and other offering expenses. The Company used $7.3 million of the net proceeds from the offering for the partial repayment of certain outstanding convertible promissory notes.

On January 28, 2021, the Company completed an underwritten public offering, pursuant to which the Company sold 17,530,488 shares of its common stock, at a price to the public of $2.05 per share, which included the exercise in full by the underwriter of its option to purchase up to 2,286,585 additional shares of common stock. The net proceeds to the Company from the offering were approximately $33.5 million, after deducting underwriting discounts, commissions and other offering expenses. The Company used $3.8 million of the net proceeds from the offering for the partial repayment of certain outstanding convertible promissory notes.

Stock Purchase Agreement with iX Biopharma Europe Limited

On November 24, 2021, the Company entered in an exclusive license agreement and stock purchase agreement (the “iXBEL Stock Purchase Agreement”) with iX Biopharma Europe Limited (“iXBEL”). As consideration for the license under the license agreement, the Company paid iXBEL an upfront fee of $9.0 million, comprised of $3.5 million in cash and 2,570,266 restricted shares of the Company’s common stock. Pursuant to the iXBEL Stock Purchase Agreement, the Company agreed to reimburse iXBEL for the difference in value (the “Shortfall Amount”) in the event the aggregate value of the 2,570,266 shares of the Company’s common stock at the time of registration and issuance was less than $5.5 million. The initial fair value of this Shortfall Amount was $0.8 million and in January 2022, the Company settled the Shortfall Amount by the payment of $1.2 million in cash to iXBEL. The change in fair value of the Shortfall Amount is included in Change in fair value of derivative liability on the Condensed Consolidated Statement of Operations and Comprehensive Loss (see Note 4).