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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Preferred Stock [Member] Series A Convertible Redeemable Preferred Stock [Member] | Preferred Stock [Member] Series B Convertible Redeemable Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2021 |  |  | $ 1,472 | $ 696,563 | $ (655,640) | $ (27) | $ 42,368
Balance, shares at Dec. 31, 2021 |  |  | 5,888,217 |  |  |  |
Stock-based compensation expense |  |  |  | 3,051 |  |  | 3,051
Issuance of common stock in connection with restricted share awards, net of cancellations and shares settled for tax withholding settlement |  |  | $ 2 | (7) |  |  | (5)
Issuance of common stock in connection with restricted share awards, net of cancellations and shares settled for tax withholding settlement, shares |  |  | 742,608 |  |  |  |
Issuance of common stock and stock purchase warrants in connection with private placement offering, net of offering costs and warrant liability |  |  | $ 76 | 12,012 |  |  | 12,088
Issuance of common stock and stock purchase warrants in connection with private placement offering, net of offering costs and warrant liability, shares |  |  | 7,609,879 |  |  |  |
Issuance of common stock, net of offering costs under open market sale agreement (ATM) |  |  | $ 35 | 12,804 |  |  | 12,839
Issuance of common stock, net of offering costs under open market sale agreement (ATM), shares |  |  | 3,479,016 |  |  |  |
Issuance of Series A and Series B Convertible Redeemable Preferred Stock | $ 17,974 | $ 4,494 |  |  |  |  |
Issuance of Series A and Series B Convertible Redeemable Preferred Stock, shares | 1,000,006 | 250,005 |  |  |  |  |
Deemed dividends related to Series A and Series B Convertible Redeemable Preferred Stock | $ 3,026 | $ 756 |  | (3,782) |  |  | (3,782)
Redemption of Series A and Series B Convertible Redeemable Preferred Stock | $ (21,000) | $ (5,250) |  |  |  |  |
Redemption of Series A and Series B Convertible Redeemable Preferred Stock, shares | (1,000,006) | (250,005) |  |  |  |  |
Reverse stock split adjustment |  |  | (1,408) | 1,408 |  |  |
Net loss |  |  |  |  | (39,696) |  | (39,696)
Other comprehensive income |  |  |  |  |  | (102) | (102)
Balance at Dec. 31, 2022 |  |  | $ 177 | 722,049 | (695,336) | (129) | 26,761
Balance, shares at Dec. 31, 2022 |  |  | 17,719,720 |  |  |  |
Stock-based compensation expense |  |  |  | 4,768 |  |  | 4,768
Issuance of common stock in connection with restricted share awards, net of cancellations and shares settled for tax withholding settlement |  |  | $ 18 | (200) |  |  | (182)
Issuance of common stock in connection with restricted share awards, net of cancellations and shares settled for tax withholding settlement, shares |  |  | 1,859,869 |  |  |  |
Issuance of common stock, net of offering costs under open market sale agreement (ATM) |  |  | $ 37 | 14,586 |  |  | 14,623
Issuance of common stock, net of offering costs under open market sale agreement (ATM), shares |  |  | 3,659,882 |  |  |  |
Deemed dividends related to Series A and Series B Convertible Redeemable Preferred Stock |  |  |  |  |  |  |
Net loss |  |  |  |  | (54,188) |  | (54,188)
Other comprehensive income |  |  |  |  |  | 63 | 63
Issuance of common stock, net of offering costs under direct placement offering |  |  | $ 33 | 22,948 |  |  | 22,981
Issuance of common stock, net of offering costs under direct placement offering, shares |  |  | 3,284,407 |  |  |  |
Balance at Dec. 31, 2023 |  |  | $ 265 | $ 764,151 | $ (749,524) | $ (66) | $ 14,826
Balance, shares at Dec. 31, 2023 |  |  | 26,523,878 |  |  |  |

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