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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' (DEFICIT) EQUITY - USD ($)
shares in Thousands, $ in Thousands
Preferred Stock [Member]
Series A Cumulative Convertible Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Total
Balance at Dec. 31, 2022 $ 1 $ 26 $ 177,377 $ (165,297) $ 12,107
Balance (in shares) at Dec. 31, 2022 156 5,127      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Stock-based compensation $ 0 $ 0 689 0 689
Net loss 0 0 0 (5,416) (5,416)
Balance at Mar. 31, 2023 $ 1 $ 26 178,066 (170,713) 7,380
Balance (in shares) at Mar. 31, 2023 156 5,127      
Balance at Dec. 31, 2023 $ 1 $ 27 189,186 (186,981) 2,233
Balance (in shares) at Dec. 31, 2023 156 5,410      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of not warrants $ 0 $ 0 755 0 755
Costs allocated to note warrants 0 0 (35) 0 (35)
Stock-based compensation 0 0 282 0 282
Net loss 0 0 0 (6,647) (6,647)
Balance at Mar. 31, 2024 $ 1 $ 27 $ 190,188 $ (193,628) $ (3,412)
Balance (in shares) at Mar. 31, 2024 156 5,410