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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, 2017 21,422,077          
Balance at Dec. 31, 2017 $ 214 $ 153,858 $ (111,591) $ (25,551)    
Net loss     (1,795)     $ (1,795)
Adoption of new accounting standards at Dec. 31, 2017 $ 0 0 170 0 $ 0  
Foreign currency translation adjustment       408    
Noncash compensation   143        
Retire treasury stock (in shares) (65,895)          
Retire treasury stock $ 0 0        
Balance (in shares) at Apr. 01, 2018 21,356,182          
Balance at Apr. 01, 2018 $ 214 154,001 (113,216) (25,143)    
Balance (in shares) at Dec. 31, 2018 21,398,182          
Balance at Dec. 31, 2018 $ 214 154,388 (114,926) (24,842)   14,834
Net loss     (2,305)     (2,305)
Adoption of new accounting standards at Dec. 31, 2018 $ 0 0 1,442 0 $ 0  
Foreign currency translation adjustment       125    
Noncash compensation   111        
Retire treasury stock (in shares) (43,979)          
Retire treasury stock $ 0 (49)        
Balance (in shares) at Mar. 31, 2019 21,354,203          
Balance at Mar. 31, 2019 $ 214 $ 154,450 $ (115,789) $ (24,717)   $ 14,158