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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Retained Earnings
Treasury Stock
Total
Balance at beginning of year at Dec. 31, 2012 $ 67 $ 19,239 $ 53,954   $ 73,260
Balance (in shares) at Dec. 31, 2012 6,750,000        
Increase (Decrease) in Stockholders' Equity          
Share-based compensation $ 1 923     924
Share-based compensation (in shares) 38,000        
Exercise of stock options net of shares presented for exercise $ 1 190     191
Exercise of stock options net of shares presented for exercise (in shares) 113,000        
Net share settlement of restricted stock units and stock option tax w/h   (879)     (879)
Excess tax benefits on share-based compensation   818     818
Net income     11,276   11,276
Balance at end of year at Dec. 31, 2013 $ 69 20,291 65,230   85,590
Balance (in shares) at Dec. 31, 2013 6,901,000        
Increase (Decrease) in Stockholders' Equity          
Share-based compensation $ 1 1,118     1,119
Share-based compensation (in shares) 20,000        
Exercise of stock options net of shares presented for exercise $ 1 335     336
Exercise of stock options net of shares presented for exercise (in shares) 148,000        
Net share settlement of restricted stock units and stock option tax w/h   (831)     (831)
Excess tax benefits on share-based compensation   1,219     1,219
Net income     7,559   7,559
Balance at end of year at Dec. 31, 2014 $ 71 22,132 72,789   $ 94,992
Balance (in shares) at Dec. 31, 2014 7,069,000       7,068,815
Increase (Decrease) in Stockholders' Equity          
Share-based compensation   1,069     $ 1,069
Share-based compensation (in shares) 24,000        
Exercise of stock options net of shares presented for exercise $ 1 357     358
Exercise of stock options net of shares presented for exercise (in shares) 77,000        
Net share settlement of restricted stock units and stock option tax w/h   (209)     (209)
Excess tax benefits on share-based compensation   356     356
Repurchase of common stock       $ (587) (587)
Repurchase of common stock (in shares)       30,000  
Net income     7,593   7,593
Balance at end of year at Dec. 31, 2015 $ 72 $ 23,705 $ 80,382 $ (587) $ 103,572
Balance (in shares) at Dec. 31, 2015 7,170,000     30,000 7,170,377