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v3.23.1

STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Total
--- | --- | --- | --- | --- | ---
Beginning balance, value at Dec. 31, 2020 |  | $ 7 | $ 370,804 | $ (367,279) | $ 3,532
Beginning Balance, shares at Dec. 31, 2020 |  | 7,139 |  |  |
Net loss |  |  |  | (8,776) | (8,776)
Issuance of common stock, net |  | $ 3 | 8,838 |  | 8,841
Issuance of common stock, net, shares |  | 2,775 |  |  |
Amortization of restricted stock |  |  | 36 |  | 36
Amortization of restricted stock, shares |  |  |  |  |
Stock-based compensation |  |  | 1,505 |  | 1,505
Ending balance, value at Dec. 31, 2021 |  | $ 10 | 381,183 | (376,055) | 5,138
Ending Balance, shares at Dec. 31, 2021 |  | 9,914 |  |  |
Net loss |  |  |  | (10,206) | (10,206)
Issuance of common stock, net |  | $ 1 | 5,029 |  | 5,030
Issuance of common stock, net, shares |  | 1,151 |  |  |
Issuance of common stock upon exercise of warrants |  | $ 4 |  |  | 4
Issuance of common stock upon exercises of warrants, shares |  | 3,564 |  |  |
Amortization of restricted stock |  |  | 450 |  | 450
Amortization of restricted stock, shares |  | 387 |  |  |
Stock-based compensation |  |  | 947 |  | 947
Ending balance, value at Dec. 31, 2022 |  | $ 15 | $ 387,609 | $ (386,261) | $ 1,363
Ending Balance, shares at Dec. 31, 2022 |  | 15,016 |  |  |

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