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Consolidated Statements of Stockholder's Equity (Unaudited) - USD ($) $ in Thousands | Total | February 2024 Registered Direct Offering [Member] | November 2022 Private Placement [Member] | May 2023 Registered Direct Offering [Member] | Common Stock [Member] | Common Stock [Member] February 2024 Registered Direct Offering [Member] | Common Stock [Member] May 2023 Registered Direct Offering [Member] | Additional paid-in capital [Member] | Additional paid-in capital [Member] February 2024 Registered Direct Offering [Member] | Additional paid-in capital [Member] November 2022 Private Placement [Member] | Additional paid-in capital [Member] May 2023 Registered Direct Offering [Member] | Accumulated other comprehensive income (loss) [Member] | Accumulated deficit [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2022 | $ 8,303 |  |  |  | $ 87 |  |  | $ 144,148 |  |  |  | $ 4 | $ (135,936)
Beginning Balance, Shares at Dec. 31, 2022 |  |  |  |  | 17,897,029 |  |  |  |  |  |  |  |
Stock-based compensation expense | 1,085 |  |  |  |  |  |  | 1,085 |  |  |  |  |
Shares issued on exercise of warrants | 77 |  |  |  |  |  |  | 77 |  |  |  |  |
Shares issued on exercise of warrants, Shares |  |  |  |  | 33,333 |  |  |  |  |  |  |  |
Financing costs |  |  | $ (30) |  |  |  |  |  |  | $ (30) |  |  |
Net loss | (8,992) |  |  |  |  |  |  |  |  |  |  |  | (8,992)
Ending Balance at Mar. 31, 2023 | 443 |  |  |  | $ 87 |  |  | 145,280 |  |  |  | 4 | (144,928)
Ending Balance, Shares at Mar. 31, 2023 |  |  |  |  | 17,930,362 |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2022 | $ 8,303 |  |  |  | $ 87 |  |  | 144,148 |  |  |  | 4 | (135,936)
Beginning Balance, Shares at Dec. 31, 2022 |  |  |  |  | 17,897,029 |  |  |  |  |  |  |  |
Restricted stock unit settlements, Shares | 139,750 |  |  |  |  |  |  |  |  |  |  |  |
Net loss | $ (17,231) |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance at Jun. 30, 2023 | 9,699 |  |  |  | $ 90 |  |  | 162,772 |  |  |  | 4 | (153,167)
Ending Balance, Shares at Jun. 30, 2023 |  |  |  |  | 21,105,760 |  |  |  |  |  |  |  |
Beginning Balance at Mar. 31, 2023 | 443 |  |  |  | $ 87 |  |  | 145,280 |  |  |  | 4 | (144,928)
Beginning Balance, Shares at Mar. 31, 2023 |  |  |  |  | 17,930,362 |  |  |  |  |  |  |  |
Stock-based compensation expense | 1,190 |  |  |  |  |  |  | 1,190 |  |  |  |  |
Shares issued on exercise of warrants | 150 |  |  |  |  |  |  | 150 |  |  |  |  |
Shares issued on exercise of warrants, Shares |  |  |  |  | 65,000 |  |  |  |  |  |  |  |
Shares issued |  |  |  | $ 15,301 |  |  | $ 3 |  |  |  | $ 15,298 |  |
Shares issued, Shares |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |
SVB convertible debt refinancing discount | $ 1,074 |  |  |  |  |  |  | 1,074 |  |  |  |  |
Restricted stock unit settlements, Shares | 139,750 |  |  |  | 139,750 |  |  |  |  |  |  |  |
Restricted stock unit settlements withheld and retired to treasury | $ (220) |  |  |  |  |  |  | (220) |  |  |  |  |
Restricted stock unit settlements withheld and retired to treasury, Shares |  |  |  |  | (29,352) |  |  |  |  |  |  |  |
Net loss | (8,239) |  |  |  |  |  |  |  |  |  |  |  | (8,239)
Ending Balance at Jun. 30, 2023 | 9,699 |  |  |  | $ 90 |  |  | 162,772 |  |  |  | 4 | (153,167)
Ending Balance, Shares at Jun. 30, 2023 |  |  |  |  | 21,105,760 |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2023 | (1,448) |  |  |  | $ 90 |  |  | 164,209 |  |  |  | 4 | (165,751)
Beginning Balance, Shares at Dec. 31, 2023 |  |  |  |  | 21,165,760 |  |  |  |  |  |  |  |
Stock-based compensation expense | 1,288 |  |  |  |  |  |  | 1,288 |  |  |  |  |
Shares issued |  | $ 56,110 |  |  |  | $ 13 |  |  | $ 56,097 |  |  |  |
Shares issued, Shares |  |  |  |  |  | 13,086,151 |  |  |  |  |  |  |
Net loss | (6,494) |  |  |  |  |  |  |  |  |  |  |  | (6,494)
Ending Balance at Mar. 31, 2024 | 49,456 |  |  |  | $ 103 |  |  | 221,594 |  |  |  | 4 | (172,245)
Ending Balance, Shares at Mar. 31, 2024 |  |  |  |  | 34,251,911 |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2023 | $ (1,448) |  |  |  | $ 90 |  |  | 164,209 |  |  |  | 4 | (165,751)
Beginning Balance, Shares at Dec. 31, 2023 |  |  |  |  | 21,165,760 |  |  |  |  |  |  |  |
Restricted stock unit settlements, Shares | 113,125 |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income | $ (11) |  |  |  |  |  |  |  |  |  |  |  |
Net loss | (14,955) |  |  |  |  |  |  |  |  |  |  |  |
Ending Balance at Jun. 30, 2024 | 42,285 |  |  |  | $ 103 |  |  | 222,895 |  |  |  | (7) | (180,706)
Ending Balance, Shares at Jun. 30, 2024 |  |  |  |  | 34,341,303 |  |  |  |  |  |  |  |
Beginning Balance at Mar. 31, 2024 | 49,456 |  |  |  | $ 103 |  |  | 221,594 |  |  |  | 4 | (172,245)
Beginning Balance, Shares at Mar. 31, 2024 |  |  |  |  | 34,251,911 |  |  |  |  |  |  |  |
Stock-based compensation expense | $ 1,454 |  |  |  |  |  |  | 1,454 |  |  |  |  |
Financing costs |  | $ (39) |  |  |  |  |  |  | $ (39) |  |  |  |
Restricted stock unit settlements, Shares | 113,125 |  |  |  | 113,125 |  |  |  |  |  |  |  |
Restricted stock unit settlements withheld and retired to treasury | $ (114) |  |  |  |  |  |  | (114) |  |  |  |  |
Restricted stock unit settlements withheld and retired to treasury, Shares |  |  |  |  | (23,733) |  |  |  |  |  |  |  |
Other comprehensive income | (11) |  |  |  |  |  |  |  |  |  |  | (11) |
Net loss | (8,461) |  |  |  |  |  |  |  |  |  |  |  | (8,461)
Ending Balance at Jun. 30, 2024 | $ 42,285 |  |  |  | $ 103 |  |  | $ 222,895 |  |  |  | $ (7) | $ (180,706)
Ending Balance, Shares at Jun. 30, 2024 |  |  |  |  | 34,341,303 |  |  |  |  |  |  |  |

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