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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Treasury Stock [Member]
Total
Balance (in shares) at Dec. 31, 2016 21,329,690          
Balance at Dec. 31, 2016 $ 213 $ 153,252 $ (100,769) $ (26,598) $ 0  
Net income (loss) (in shares) 0          
Net loss     (3,308)     $ (3,308)
Foreign currency translation adjustment (in shares) 0          
Foreign currency translation adjustment       876    
Restricted common stock grant (in shares) 199,000          
Restricted common stock grant $ 2 (2) 0 0 0  
Noncash compensation (in shares) 0          
Noncash compensation   175        
Retire treasury stock (in shares) (76,787)          
Retire treasury stock $ (1) (2)        
Balance (in shares) at Apr. 02, 2017 21,451,903          
Balance at Apr. 02, 2017 $ 214 153,423 (104,077) (25,722)    
Balance (in shares) at Dec. 31, 2017 21,422,077          
Balance at Dec. 31, 2017 $ 214 153,858 (111,591) (25,551) 0 16,930
Net income (loss) (in shares) 0          
Net loss $ 0 0 (1,795) 0 0  
Foreign currency translation adjustment (in shares) 0          
Foreign currency translation adjustment $ 0 0 0 408 0  
Noncash compensation (in shares) 0          
Noncash compensation $ 0 143 0 0 0  
Retire treasury stock (in shares) (65,895)          
Retire treasury stock $ 0 0 0 0 0  
Adoption of new accounting standards $ 0 0 170 0 0  
Balance (in shares) at Apr. 02, 2018 21,356,182          
Balance at Apr. 02, 2018 $ 214 154,001 (113,216) (25,143) 0  
Balance (in shares) at Dec. 31, 2017 21,422,077          
Balance at Dec. 31, 2017 $ 214 $ 153,858 $ (111,591) $ (25,551) $ 0 16,930
Net loss           (1,795)
Balance at Apr. 01, 2018           $ 15,856