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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Accumulated Deficit [Member] | Series X1 Non-voting Convertible Preferred Stock [Member] | Series X1 Non-voting Convertible Preferred Stock [Member] Common Stock [Member] | Series X Non Voting Convertible Preferred Stock
--- | --- | --- | --- | --- | --- | --- | ---
Balance as of December 31, 2019 at Dec. 31, 2019 | $ 9,465 | $ 1 | $ 67,046 | $ (57,582) |  |  |
Balance as of December 31, 2019 at Dec. 31, 2019 |  | 720,408 |  |  |  |  |
Issuance of common stock in connection with PIPE transaction, net of issuance costs | 8,550 | $ 1 | 8,549 |  |  |  |
Issuance of preferred stock in connection with PIPE transaction, net of issuance costs, Shares |  | 1,004,111 |  |  |  |  |
Issuance of common stock in connection with exercise of warrants, net of issuance costs | 5,380 |  | 5,380 |  |  |  |
Issuance of common stock in connection with exercise of warrants, net of issuance costs, Shares |  | 421,772 |  |  |  |  |
Issuance of common stock in connection with conversion of Series X preferred stock |  |  | (13) |  |  | $ 13 |
Issuance of common stock in connection with conversion of Series X preferred stock, Shares |  | 210,888 |  |  | (231,068) | 12,837,056 | (3,796)
Issuance of common stock in connection with vesting of restricted stock units |  | 3,056 |  |  |  |  |
Issuance of preferred stock in connection with acquisition | 1,194 |  | 1,194 |  |  |  |
Issuance of preferred stock in connection with acquisition |  | 175,488 |  |  |  |  |
Cancellation of common stock in connection with exchange for preferred stock, Shares |  | (210,889) |  |  |  |  | 3,796
Cancellation of common stock in connection with reverse split | (25) |  | (25) |  |  |  |
Cancellation of common stock in connection with reverse split, Shares |  | (1,493) |  |  |  |  |
Issuance of preferred stock in connection with acquisition | 69,723 |  | 69,723 |  |  |  |
Issuance of preferred stock in connection with acquisition,shares |  |  |  |  | 140,026 |  |
Issuance of preferred stock in connection with PIPE transaction, net of issuance costs | 95,226 |  | 95,226 |  |  |  |
Issuance of preferred stock in connection with PIPE transaction, net of issuance costs, shares |  |  |  |  | 199,112 |  |
Fair value of options assumed in acquisition | 2,950 |  | 2,950 |  |  |  |
Fair value of warrants assumed in acquisition | 12,944 |  | 12,944 |  |  |  |
Warrant inducement expense | 4,829 |  | 4,829 |  |  |  |
Stock-based compensation | 3,171 |  | 3,171 |  |  |  |
Net loss and other comprehensive loss | (22,811) |  |  | (22,811) |  |  |
Ending Balance at Dec. 31, 2020 | 190,596 | $ 15 | 270,974 | (80,393) |  |  |
Temporary Equity, Ending Balance, Shares at Dec. 31, 2020 |  |  |  |  | 108,070 |  |
Ending Balance, Shares at Dec. 31, 2020 |  | 15,160,397 |  |  |  |  |
Cancellation of common stock in connection with exchange for preferred stock, Shares |  | (344,666) |  |  |  |  | 6,204
Cancellation of common stock in connection with exchange for warrants |  | $ (1) | 1 |  |  |  |
Cancellation of common stock in connection with exchange for warrants, Shares |  | (509,117) |  |  |  |  |
Stock-based compensation | 7,904 |  | 7,904 |  |  |  |
Stock options exercised | $ 1 |  | 1 |  |  |  |
Stock options exercised, Shares | 174 | 174 |  |  |  |  |
Net loss and other comprehensive loss | $ (34,506) |  |  | (34,506) |  |  |
Ending Balance at Dec. 31, 2021 | $ 163,995 | $ 14 | $ 278,880 | $ (114,899) |  |  |
Temporary Equity, Ending Balance, Shares at Dec. 31, 2021 |  |  |  |  | 108,070 |  |
Ending Balance, Shares at Dec. 31, 2021 |  | 14,306,788 |  |  |  |  | 6,204
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2020 |  |  |  |  | 108,070 |  |

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