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Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
$ in Thousands
Cumulative Effect, Period of Adoption, Adjustment [Member]
Common Stock Outstanding [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Additional Paid-in Capital [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
AOCI Attributable to Parent [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Treasury Stock [Member]
Common Stock Outstanding [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Treasury Stock [Member]
Total
Balance (in shares) at Dec. 31, 2018           21,398,182          
Balance at Dec. 31, 2018           $ 214 $ 154,388 $ (114,926) $ (24,842) $ 0  
Net income (loss)           0 0 (3,090) 0 0 $ (3,090)
Foreign currency translation adjustment           $ 0 0 0 (26) 0  
Noncash compensation (in shares)           60,000          
Noncash compensation           $ 0 389 0 0 0  
Retire treasury stock (in shares)           (149,756)          
Retire treasury stock           $ 0 (137) 0 0 0  
Balance (in shares) at Sep. 29, 2019           21,308,426          
Balance at Sep. 29, 2019 $ 0 $ 0 $ 1,442 $ 0 $ 0 $ 214 154,640 (116,574) (24,868) 0  
Balance (in shares) at Jun. 30, 2019           21,329,708          
Balance at Jun. 30, 2019           $ 214 154,538 (115,017) (24,630) 0  
Net income (loss)           0 0 (1,557) 0 0 (1,557)
Foreign currency translation adjustment           $ 0 0 0 (238) 0  
Noncash compensation (in shares)           0          
Noncash compensation           $ 0 106 0 0 0  
Retire treasury stock (in shares)           (21,282)          
Retire treasury stock           $ 0 (4) 0 0 0  
Balance (in shares) at Sep. 29, 2019           21,308,426          
Balance at Sep. 29, 2019 $ 0 $ 0 $ 1,442 $ 0 $ 0 $ 214 154,640 (116,574) (24,868) 0  
Balance (in shares) at Dec. 31, 2019           21,298,426          
Balance at Dec. 31, 2019           $ 213 154,702 (117,433) (24,051) 0 13,431
Net income (loss)           0 0 2,842 0 0 2,842
Foreign currency translation adjustment           $ 0 0 0 (1,373) 0  
Noncash compensation (in shares)           70,000          
Noncash compensation           $ 0 335 0 0 0  
Retire treasury stock (in shares)           (62,828)          
Retire treasury stock           $ 0 (26) 0 0 0  
Exercise of stock options (in shares)           11,154          
Exercise of stock options           $ 0 (7) 0 0 0  
Balance (in shares) at Oct. 04, 2020           21,316,752          
Balance at Oct. 04, 2020           $ 213 155,004 (114,591) (25,424) 0 15,202
Balance (in shares) at Jul. 05, 2020           21,369,580          
Balance at Jul. 05, 2020           $ 213 154,923 (118,086) (25,532) 0  
Net income (loss)           0 0 3,495 0 0 3,495
Foreign currency translation adjustment           $ 0 0 0 108 0  
Noncash compensation (in shares)           10,000          
Noncash compensation           $ 0 107 0 0 0  
Retire treasury stock (in shares)           (62,828)          
Retire treasury stock           $ 0 (26) 0 0 0  
Balance (in shares) at Oct. 04, 2020           21,316,752          
Balance at Oct. 04, 2020           $ 213 $ 155,004 $ (114,591) $ (25,424) $ 0 $ 15,202