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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Series B Private Placement Warrants [Member]
Preferred Stock [Member]
Series B Private Placement Warrants [Member]
Common Stock [Member]
Series B Private Placement Warrants [Member]
Additional Paid-in Capital [Member]
Series B Private Placement Warrants [Member]
Retained Earnings [Member]
Series B Private Placement Warrants [Member]
Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2021           14 1,365      
Balance at Dec. 31, 2021           $ 680 $ 478 $ 150,900 $ (141,887) $ 10,171
Net Loss                 (111) (111)
Reclassification of Private Placement Warrants $ 0 $ 0 $ 7,502 $ 0 $ 7,502          
Conversion of preferred stock to common stock (in shares)           (1) 104      
Conversion of Series B Preferred Stock           $ (71) $ (36) (35) 0 0
Conversion of Series B Preferred Stock           71 36 35 0 0
Stock-based compensation expense related to employee and director stock awards           $ 0 $ 0 184 0 184
Balance (in shares) at Mar. 31, 2022           13 1,469      
Balance at Mar. 31, 2022           $ 609 $ 514 158,621 (141,998) 17,746
Balance (in shares) at Dec. 31, 2022           14 2,035      
Balance at Dec. 31, 2022           $ 2,973 $ 652 165,081 (158,152) 10,554
Net Loss           0 0 0 (1,739) (1,739)
Stock-based compensation expense related to employee and director stock awards           $ 0 $ 0 75 0 75
Balance (in shares) at Mar. 31, 2023           14 2,035      
Balance at Mar. 31, 2023           $ 2,973 $ 652 $ 165,156 $ (159,891) $ 8,890