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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Common Stock Outstanding [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Total
Balance (in shares) at Dec. 31, 2018 7,385     30  
Balance at Dec. 31, 2018 $ 74 $ 29,168 $ 111,802 $ (587) $ 140,457
Share-based compensation (in shares) 20      
Share-based compensation 294 294
Exercise of stock options (in shares) 17      
Exercise of stock options 285 285
Net share settlement of restricted stock units (in shares) (8)      
Net share settlement of restricted stock units (271) (271)
Net income 3,734 3,734
Balance (in shares) at Mar. 31, 2019 7,414     30  
Balance at Mar. 31, 2019 $ 74 29,476 115,536 $ (587) 144,499
Balance (in shares) at Dec. 31, 2019 7,446     30  
Balance at Dec. 31, 2019 $ 74 30,952 131,552 $ (587) 161,991
Share-based compensation (in shares) 28      
Share-based compensation 537 537
Exercise of stock options (in shares) 20      
Exercise of stock options $ 1 415 416
Net share settlement of restricted stock units (in shares) (11)      
Net share settlement of restricted stock units (560) (560)
Net income 3,891 3,891
Balance (in shares) at Mar. 31, 2020 7,483     30  
Balance at Mar. 31, 2020 $ 75 $ 31,344 $ 135,443 $ (587) $ 166,275