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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     (6,455)   $ (6,455)
Foreign currency translation adjustment (in shares) 0        
Foreign currency translation adjustment       1,180  
Restricted common stock grant (in shares) 199,000        
Restricted common stock grant $ 2 (2)      
Noncash compensation (in shares) 42,000        
Noncash compensation   395      
Treasury stock (in shares) (33,000)        
Retire treasury stock (in shares) (101,302)        
Retire treasury stock $ (1) (108)      
Balance (in shares) at Jul. 02, 2017 21,436,388        
Balance at Jul. 02, 2017 $ 214 153,537 (107,224) (25,418)  
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     (981)   (981)
Foreign currency translation adjustment (in shares) 0        
Foreign currency translation adjustment       (98)  
Noncash compensation (in shares) 42,000        
Noncash compensation   348      
Retire treasury stock (in shares) (65,895)        
Retire treasury stock   (107)      
Balance (in shares) at Jul. 01, 2018 21,398,182        
Balance at Jul. 01, 2018 $ 214 $ 154,099 (112,402) $ (25,649) $ 16,262
Adoption of new accounting standards     $ 170