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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]
Total
Balance (in shares) at Dec. 31, 2016 21,329,690        
Balance at Dec. 31, 2016 $ 213 $ 153,252 $ (100,769) $ (26,598)  
Net income (loss) (in shares) 0        
Net loss     (9,588)   $ (9,588)
Foreign currency translation adjustment (in shares) 0        
Foreign currency translation adjustment       1,133  
Restricted common stock grant (in shares) 199,000        
Restricted common stock grant $ 2 (2)      
Noncash compensation (in shares) 42,000        
Noncash compensation   563      
Treasury stock (in shares) (39,000)        
Retire treasury stock (in shares) (109,613)        
Retire treasury stock $ (1) (122)      
Balance (in shares) at Oct. 01, 2017 21,422,077        
Balance at Oct. 01, 2017 $ 214 153,691 (110,357) (25,465)  
Balance (in shares) at Dec. 31, 2017 21,422,077        
Balance at Dec. 31, 2017 $ 214 153,858 (111,591) (25,551) 16,930
Net income (loss) (in shares) 0        
Net loss     (3,317)   (3,317)
Foreign currency translation adjustment (in shares) 0        
Foreign currency translation adjustment       297  
Noncash compensation (in shares) 42,000        
Noncash compensation   493      
Retire treasury stock (in shares) (65,895)        
Retire treasury stock   (107)      
Balance (in shares) at Sep. 30, 2018 21,398,182        
Balance at Sep. 30, 2018 $ 214 $ 154,244 (114,738) $ (25,254) $ 14,466
Adoption of new accounting standards $ 0   $ 170