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Consolidated Statements of Stockholders' Equity (Deficiency) - USD ($)
shares in Thousands, $ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balance (in shares) at Dec. 31, 2015 18,868        
Balance at Dec. 31, 2015 $ 77,628 $ 9,246 $ (69,146) $ (28,667) $ (10,939)
Share-based compensation expense   315     315
Issuance of shares for incentive plan (in shares) 99        
Issuance of shares for incentive plan $ 504       504
Vested restricted stock issued (in shares) 50        
Vested restricted stock issued $ 315 (315)    
Shares cancelled to pay tax liability (in shares) (59)        
Shares cancelled to pay tax liability $ (324)       (324)
Other comprehensive gain-pension (Note 6)       6,372 6,372
Net income     21,814 21,814
Balance (in shares) at Dec. 31, 2016 18,958        
Balance at Dec. 31, 2016 $ 78,123 9,246 (47,332) (22,295) 17,742
Share-based compensation expense   448     448
Issuance of shares for incentive plan (in shares) 94        
Issuance of shares for incentive plan $ 767       767
Vested restricted stock issued (in shares) 59        
Vested restricted stock issued $ 448 (448)    
Shares cancelled to pay tax liability (in shares) (71)        
Shares cancelled to pay tax liability $ (754)       (754)
Other comprehensive gain-pension (Note 6)       2,041 2,041
Net income     10,900 10,900
Balance (in shares) at Dec. 31, 2017 19,040        
Balance at Dec. 31, 2017 $ 78,584 $ 9,246 $ (36,432) $ (20,254) $ 31,144