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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]
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)
Stock-based compensation expense related to employee and director stock awards                     $ 0 $ 0 184 0 184
Conversion of Preferred Stock to common stock (in shares)                     (1) 104      
Conversion of Preferred Stock to common stock                     $ 71 $ 36 35 0 0
Reclassification of May 2023 Warrants                     0 0 7,502 0 7,502
Conversion of Preferred Stock to common stock                     $ (71) $ (36) (35) 0 0
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, 2021                     14 1,365      
Balance at Dec. 31, 2021                     $ 680 $ 478 150,900 (141,887) 10,171
Net Loss                             (2,266)
Conversion of Preferred Stock to common stock         $ 110         $ 0          
Conversion of Preferred Stock to common stock         (110)         0          
Balance (in shares) at Jun. 30, 2022                     12 1,529      
Balance at Jun. 30, 2022                     $ 570 $ 535 158,793 (144,153) 15,745
Balance (in shares) at Mar. 31, 2022                     13 1,469      
Balance at Mar. 31, 2022                     $ 609 $ 514 158,621 (141,998) 17,746
Net Loss                     0 0 0 (2,155) (2,155)
Stock-based compensation expense related to employee and director stock awards                     $ 0 $ 0 154 0 154
Conversion of Preferred Stock to common stock (in shares)                     (1) 57      
Conversion of Preferred Stock to common stock                     $ (39) $ 20 19 0 0
Vesting of director restricted stock awards (in shares)                     0 3      
Conversion of Preferred Stock to common stock                     $ 39 $ (20) (19) 0 0
Vesting of director restricted stock awards                     $ 0 $ 1 (1) 0 0
Balance (in shares) at Jun. 30, 2022                     12 1,529      
Balance at Jun. 30, 2022                     $ 570 $ 535 158,793 (144,153) 15,745
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
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                             (3,775)
Conversion of Preferred Stock to common stock         121         728          
Conversion of Preferred Stock to common stock         (121)         (728)          
Balance (in shares) at Jun. 30, 2023                     10 4,214      
Balance at Jun. 30, 2023                     $ 2,124 $ 673 169,689 (163,923) 8,563
Balance (in shares) at Mar. 31, 2023                     14 2,035      
Balance at Mar. 31, 2023                     $ 2,973 $ 652 165,156 (159,891) 8,890
Net Loss                     0 0 0 (2,036) (2,036)
Stock-based compensation expense related to employee and director stock awards                     0 0 64 0 64
Conversion of Preferred Stock to common stock (in shares) (3) 1,897       (1) 277                
Conversion of Preferred Stock to common stock $ (121) $ 19 $ 102 $ 0 0 $ (728) $ 2 $ 726 $ 0 0          
Modification of common stock warrants                     0 0 285 0 285
Down round feature adjustment related to Series B & C Preferred Stock                     0 0 1,996 (1,996) 0
Reclassification of May 2023 Warrants                     $ 0 $ 0 1,360 0 1,360
Vesting of director restricted stock awards (in shares)                     0 5      
Conversion of Preferred Stock to common stock $ 121 $ (19) $ (102) $ 0 $ 0 $ 728 $ (2) $ (726) $ 0 $ 0          
Balance (in shares) at Jun. 30, 2023                     10 4,214      
Balance at Jun. 30, 2023                     $ 2,124 $ 673 $ 169,689 $ (163,923) $ 8,563