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Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Noncontrolling Interest [Member]
Total
Balance (in shares) at Dec. 31, 2018 20,053,335            
Balance at Dec. 31, 2018 $ 2,005 $ 182,630 $ (2,786) $ (58,035) $ (19,266) $ (85) $ 104,463
Net income       3,579   74 3,653
Share repurchases         (1,957)   (1,957)
Stock option exercises (in shares) 194,720            
Stock option exercises $ 20 846         866
Stock-based compensation – stock options   433         433
Stock-based compensation - restricted stock   86          
Vesting of restricted stock (in shares) 5,834            
Vesting of restricted stock         (8)   (8)
Foreign currency translation adjustments     (685)       (685)
Balance (in shares) at Sep. 29, 2019 20,253,889            
Balance at Sep. 29, 2019 $ 2,025 183,995 (3,471) (54,456) (21,231) (11) 106,851
Balance (in shares) at Jun. 30, 2019 20,163,756            
Balance at Jun. 30, 2019 $ 2,016 183,457 (2,803) (55,354) (21,231) (34) 106,051
Net income       898   23 921
Stock option exercises (in shares) 90,133            
Stock option exercises $ 9 379         388
Stock-based compensation – stock options   117         117
Stock-based compensation - restricted stock   42         42
Foreign currency translation adjustments     (668)       (668)
Balance (in shares) at Sep. 29, 2019 20,253,889            
Balance at Sep. 29, 2019 $ 2,025 183,995 (3,471) (54,456) (21,231) (11) $ 106,851
Balance (in shares) at Dec. 31, 2019 20,268,050           15,866,868
Balance at Dec. 31, 2019 $ 2,026 184,292 (2,531) (52,830) (21,231) 24 $ 109,750
Net income       3,124   90 $ 3,214
Stock option exercises (in shares) 50,797           50,797
Stock option exercises $ 5 213         $ 218
Stock-based compensation – stock options   674         674
Stock-based compensation - restricted stock   82         82
Vesting of restricted stock (in shares) 12,501            
Foreign currency translation adjustments     (88)       (88)
Vesting of restricted stock $ 2       (15)   $ (13)
Balance (in shares) at Sep. 30, 2020 20,331,348           15,928,055
Balance at Sep. 30, 2020 $ 2,033 185,261 (2,619) (49,706) (21,246) 114 $ 113,837
Balance (in shares) at Jun. 30, 2020 20,297,182            
Balance at Jun. 30, 2020 $ 2,030 184,900 (3,296) (50,113) (21,246) 59 112,334
Net income       407   55 462
Stock option exercises (in shares) 34,166            
Stock option exercises $ 3 139         142
Stock-based compensation – stock options   204         204
Stock-based compensation - restricted stock   18         18
Foreign currency translation adjustments     677       $ 677
Balance (in shares) at Sep. 30, 2020 20,331,348           15,928,055
Balance at Sep. 30, 2020 $ 2,033 $ 185,261 $ (2,619) $ (49,706) $ (21,246) $ 114 $ 113,837