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Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Accumulated Deficit [Member] | Series X1 Preferred Stock [Member]
--- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2019 | $ 9,465 | $ 1 | $ 67,046 | $ (57,582) |
Beginning Balance, Shares at Dec. 31, 2019 |  | 720,408 |  |  |
Issuance of common stock in connection with exercise of warrants, net of issuance costs | $ 5,191 |  | 5,191 |  |
Issuance of common stock in connection with exercise of warrants, net of issuance costs, Shares |  | 383,234 |  |  |
Issuance of common stock in connection with conversion of preferred stock, shares | (3,285) | 182,500 |  |  |
Issuance of common stock in connection with vesting of restricted stock units, Shares |  | 1,389 |  |  |
Cancellation of common stock in connection with exchange for preferred stock, Shares | 3,796 | (210,889) |  |  |
Warrant inducement expense | $ 4,829 |  | 4,829 |  |
Stock-based compensation | 634 |  | 634 |  |
Net loss and other comprehensive loss | (10,763) |  |  | (10,763) |
Ending Balance at Jun. 30, 2020 | $ 9,356 | $ 1 | 77,700 | (68,345) |
Ending Balance, Shares at Jun. 30, 2020 | 511 | 1,076,642 |  |  |
Beginning Balance at Mar. 31, 2020 | $ 11,745 | $ 1 | 77,503 | (65,759) |
Beginning Balance, Shares at Mar. 31, 2020 | 3,796 | 892,753 |  |  |
Issuance of common stock in connection with conversion of preferred stock, shares | (3,285) | 182,500 |  |  |
Issuance of common stock in connection with vesting of restricted stock units, Shares |  | 1,389 |  |  |
Stock-based compensation | $ 197 |  | 197 |  |
Net loss and other comprehensive loss | (2,586) |  |  | (2,586) |
Ending Balance at Jun. 30, 2020 | $ 9,356 | $ 1 | 77,700 | (68,345) |
Ending Balance, Shares at Jun. 30, 2020 | 511 | 1,076,642 |  |  |
Beginning Balance at Dec. 31, 2020 | $ 190,596 | $ 15 | 270,974 | (80,393) |
Temporary Equity, Beginning Balance, Shares at Dec. 31, 2020 |  |  |  |  | 108,070
Beginning Balance, Shares at Dec. 31, 2020 |  | 15,160,397 |  |  |
Cancellation of common stock in connection with exchange for preferred stock, Shares | 6,204 | (344,666) |  |  |
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 | $ 3,808 |  | 3,808 |  |
Net loss and other comprehensive loss | (15,883) |  |  | (15,883) |
Ending Balance at Jun. 30, 2021 | $ 178,521 | $ 14 | 274,783 | (96,276) |
Temporary Equity, Ending Balance, Shares at Jun. 30, 2021 |  |  |  |  | 108,070
Ending Balance, Shares at Jun. 30, 2021 | 6,204 | 14,306,614 |  |  |
Beginning Balance at Mar. 31, 2021 | $ 183,871 | $ 14 | 272,749 | (88,892) |
Temporary Equity, Beginning Balance, Shares at Mar. 31, 2021 |  |  |  |  | 108,070
Beginning Balance, Shares at Mar. 31, 2021 | 6,204 | 14,306,614 |  |  |
Stock-based compensation | $ 2,034 |  | 2,034 |  |
Net loss and other comprehensive loss | (7,384) |  |  | (7,384) |
Ending Balance at Jun. 30, 2021 | $ 178,521 | $ 14 | $ 274,783 | $ (96,276) |
Temporary Equity, Ending Balance, Shares at Jun. 30, 2021 |  |  |  |  | 108,070
Ending Balance, Shares at Jun. 30, 2021 | 6,204 | 14,306,614 |  |  |

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