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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock Outstanding [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2019 5,749          
Balance at Dec. 31, 2019   $ 117 $ 83,688 $ (156,837) $ 207,007 $ 133,975
Net income (loss)   (1,304) (1,304)
Exercise of stock awards-shares issued including tax benefits (in shares) 2          
Exercise of stock awards-shares issued including tax benefits   0
Treasury stock repurchases (in shares) (9)          
Treasury stock repurchases   (321) (321)
Stock based compensation   305 305
Balance (in shares) at Mar. 31, 2020 5,742          
Balance at Mar. 31, 2020   117 83,993 (157,158) 205,703 132,655
Balance (in shares) at Dec. 31, 2019 5,749          
Balance at Dec. 31, 2019   117 83,688 (156,837) 207,007 133,975
Net income (loss)           (2,127)
Balance (in shares) at Jun. 30, 2020 5,776          
Balance at Jun. 30, 2020   117 84,014 (157,158) 204,880 131,853
Balance (in shares) at Mar. 31, 2020 5,742          
Balance at Mar. 31, 2020   117 83,993 (157,158) 205,703 132,655
Net income (loss)   (823) (823)
Exercise of stock awards-shares issued including tax benefits (in shares) 34          
Exercise of stock awards-shares issued including tax benefits   0
Treasury stock repurchases (in shares)          
Treasury stock repurchases   0
Stock based compensation   21 21
Balance (in shares) at Jun. 30, 2020 5,776          
Balance at Jun. 30, 2020   117 84,014 (157,158) 204,880 131,853
Balance (in shares) at Dec. 31, 2020 5,728          
Balance at Dec. 31, 2020   117 84,148 (159,118) 224,834 149,981
Net income (loss)   11,949 11,949
Exercise of stock awards-shares issued including tax benefits (in shares)          
Exercise of stock awards-shares issued including tax benefits   0
Treasury stock repurchases (in shares) (3)          
Treasury stock repurchases   (144) (144)
Stock based compensation   79 79
Balance (in shares) at Mar. 31, 2021 5,725          
Balance at Mar. 31, 2021   117 84,227 (159,262) 236,783 161,865
Balance (in shares) at Dec. 31, 2020 5,728          
Balance at Dec. 31, 2020   117 84,148 (159,118) 224,834 149,981
Net income (loss)           27,266
Balance (in shares) at Jun. 30, 2021 5,726          
Balance at Jun. 30, 2021   117 84,401 (159,262) 252,100 177,356
Balance (in shares) at Mar. 31, 2021 5,725          
Balance at Mar. 31, 2021   117 84,227 (159,262) 236,783 161,865
Net income (loss)   15,317 15,317
Exercise of stock awards-shares issued including tax benefits (in shares) 1          
Exercise of stock awards-shares issued including tax benefits   0
Treasury stock repurchases   0
Stock based compensation   174 174
Balance (in shares) at Jun. 30, 2021 5,726          
Balance at Jun. 30, 2021   $ 117 $ 84,401 $ (159,262) $ 252,100 $ 177,356