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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Beginning Balance at Dec. 31, 2017 $ 7,346 $ 8 $ 232,026 $ (224,688)
Beginning Balance, shares at Dec. 31, 2017   8,068    
Cumulative effect of accounting change 230     230
Issuance costs for the sale of common stock (12)   (12)  
Issuance of common stock for release of awards (38)   (38)  
Issuance of common stock for release of awards, shares   103    
Stock-based compensation 93   93  
Net income 348     348
Ending Balance at Mar. 31, 2018 7,967 $ 8 232,069 (224,110)
Ending Balance, shares at Mar. 31, 2018   8,171    
Beginning Balance at Dec. 31, 2018 $ 7,157 $ 43 242,981 (235,867)
Beginning Balance, shares at Dec. 31, 2018 42,967 42,967    
Issuance of common stock for release of awards $ (1)   (1)  
Issuance of common stock for release of awards, shares   172    
Stock-based compensation (4)   (4)  
Net income 10     10
Ending Balance at Mar. 31, 2019 $ 7,162 $ 43 $ 242,976 $ (235,857)
Ending Balance, shares at Mar. 31, 2019 43,139 43,139