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Warrants to Purchase Convertible Preferred Stock | 12 Months Ended
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Dec. 31, 2021
Warrants And Rights Note Disclosure [Abstract] |
Warrants to Purchase Convertible Preferred Stock | Note 9 – Warrants to Pur chase Convertible Preferred Stock The Company issued warrants to purchase shares of convertible preferred stock in conjunction with the sale of certain of the convertible preferred shares and issuance of debt. Through the closing of the Company’s IPO, the preferred warrants were classified as liabilities with estimated fair value remeasured at each reporting date reported within in the accompanying statements of operations. The following table presents the activity for convertible preferred stock warrants (in thousands, except weighted average exercise price):
|  | Series E |  |  | Series G (1) |
|  | Warrants |  |  | Weighted Average Exercise price |  |  | Warrants |  |  | Weighted Average Exercise price |
Outstanding ‑ January 1, 2020 |  |  | 925 |  |  | $ | 5.00 |  |  |  | 613 |  |  | $ | 0.75 |
Granted |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Forfeited/canceled |  |  | (925 | ) |  |  | (5.00 | ) |  |  | — |  |  |  | — |
Exercised |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Reclassification of warrant liability to additional paid-in capital |  |  | — |  |  |  | — |  |  |  | (613 | ) |  |  | (0.75 | )
Outstanding ‑ December 31, 2020 |  |  | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
The warrants to purchase Series E convertible preferred stock were not exercised and expired during the three months ended June 2020. (1) On October 27, 2020, all convertible preferred stock converted to common stock at the completion of our IPO, and as a consequence, the warrants to purchase Series G convertible preferred stock were converted to 103,326 warrants to purchase common stock at $4.46 per share, which have an expiration date of February 23, 2028. All common stock warrants remain outstanding as of December 31, 2021.

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