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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Conversion of Series B Preferred Stock to Common Stock [Member]
Preferred Stock [Member]
Conversion of Series B Preferred Stock to Common Stock [Member]
Common Stock [Member]
Conversion of Series B Preferred Stock to Common Stock [Member]
Additional Paid-in Capital [Member]
Conversion of Series B Preferred Stock to Common Stock [Member]
Retained Earnings [Member]
Conversion of Series B Preferred Stock to Common Stock [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Preferred Stock [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Common Stock [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Additional Paid-in Capital [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Retained Earnings [Member]
Conversion of Series C Preferred Stock to Common Stock [Member]
Employees and Directors [Member]
Preferred Stock [Member]
Employees and Directors [Member]
Common Stock [Member]
Employees and Directors [Member]
Additional Paid-in Capital [Member]
Employees and Directors [Member]
Retained Earnings [Member]
Employees and Directors [Member]
Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2022                               14 2,035      
Balance at Dec. 31, 2022                               $ 2,973 $ 20 $ 165,713 $ (158,152) $ 10,554
Net loss                               $ 0 $ 0 0 (1,739) (1,739)
Conversion of Preferred Stock to common stock                                       0
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 $ 20 165,788 (159,891) 8,890
Balance (in shares) at Dec. 31, 2023                               7 11,230      
Balance at Dec. 31, 2023                               $ 1,950 $ 112 176,101 (174,849) 3,314
Net loss                               0 0 0 (3,214) (3,214)
Conversion of Preferred Stock to common stock (in shares) (5) 18,813       0 1,982                          
Conversion of Preferred Stock to common stock $ (231) $ 188 $ 43 $ 0 $ 0 $ (234) $ 20 $ 214 $ 0 $ 0                   465
Adjustment of Series C Preferred Stock conversion price                               $ 0 $ 0 380 (380) 0
Stock-based compensation expense related to employee and director stock awards                     $ 0 $ 0 $ 60 $ 0 $ 60          
Balance (in shares) at Mar. 31, 2024                               2 32,025      
Balance at Mar. 31, 2024                               $ 1,485 $ 320 $ 176,798 $ (178,443) $ 160