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Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Treasury Stock [Member]
Total
Balance at Dec. 31, 2018 $ 464 $ 548,304 $ (525,463) $ (5,168) $ 18,137
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 0 0 (858) 0 (858)
Balance at Mar. 31, 2019 464 548,304 (526,321) (5,168) 17,279
Balance at Dec. 31, 2019 464 548,304 (530,389) (5,168) 13,211
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) 0 0 (1,418) 0 (1,418)
Balance at Mar. 31, 2020 $ 464 $ 548,304 $ (531,807) $ (5,168) $ 11,793