Warrants (Details) - shares

3 Months Ended

Feb. 08, 2021

Dec. 08, 2020

Mar. 31, 2022

Warrants (Details) [Line Items]

Warrants issued and outstanding

9,092,499

Securities Purchase Agreement [Member]

Warrants (Details) [Line Items]

Warrants, description

the Company entered into another securities purchase agreement with the same investors, pursuant to which the Company issued in a registered direct offering, an aggregate of 8,939,976 shares of common stock of the Company at a per share purchase price of $7.83. In addition, the Company issued to the investors (i) in a concurrent private placement, the Series A-1 warrants to purchase a total of 4,469,988 shares of common stock, at a per share exercise price of $7.67 and exercisable for 42 months from the date of issuance; (ii) in the registered direct offering, the Series B warrants to purchase a total of 4,469,988 shares of common stock, at a per share exercise price of $7.83 and exercisable for 90 days from the date of issuance; and (iii) in the registered direct offering, the Series A-2 warrants to purchase up to 2,234,992 shares of common stock, at a per share exercise price of $7.67 and exercisable for 45 months from the date of issuance. The Company received gross proceeds of approximately $70 million from the registered direct offering and the concurrent private placement, before deducting fees to the placement agent and other estimated offering expenses of $5.0 million payable by the Company. In addition, the placement agent for this transaction also received warrants (“Placement Agent Warrants”) for the purchase of up to 446,999 shares of the Company’s common stock at an exercise price of $9.204 per share exercisable for 36 months after 6 months from the issuance.

the Company entered in a securities purchase agreement with certain institutional investors, pursuant to which the Company issued in a registered direct offering, an aggregate of 9,489,800 shares of its common stock at a price of $5.18 per share, for aggregate gross proceeds to the Company of approximately $49 million, before deducting fees to the placement agent and other estimated offering expenses payable by the Company. As part of the transaction, the institutional investors also received warrants (“Investor Warrants”) for the purchase of up to 3,795,920 shares of the Company’s common stock at an exercise price of $6.46 per share exercisable for 36 months from the date of issuance. In addition, the placement agent for this transaction also received warrants (“Placement Agent Warrants”) for the purchase of up to 379,592 shares of the Company’s common stock at an exercise price of $6.475 per share exercisable for 36 months after 6 months from the issuance.