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Consolidated Statements of Changes in Stockholders' 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, 2019 20,268,050            
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            
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            
Vesting of restricted stock $ 2       (15)   (13)
Foreign currency translation adjustments     (88)       (88)
Balance (in shares) at Sep. 30, 2020 20,331,348            
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            
Balance at Sep. 30, 2020 $ 2,033 185,261 (2,619) (49,706) (21,246) 114 $ 113,837
Balance (in shares) at Dec. 31, 2020 20,373,519           15,959,984
Balance at Dec. 31, 2020 $ 2,037 185,464 (1,782) (47,598) (21,321) 123 $ 116,923
Net income       897   1 $ 898
Stock option exercises (in shares) 127,324           184,429
Stock option exercises $ 13 385     (133)   $ 265
Stock-based compensation – stock options   468         468
Stock-based compensation - restricted stock   44         44
Vesting of restricted stock (in shares) 12,501            
Vesting of restricted stock $ 1 (1)     (15)   (15)
Foreign currency translation adjustments     (37)       $ (37)
Balance (in shares) at Sep. 30, 2021 20,513,344           16,080,749
Balance at Sep. 30, 2021 $ 2,051 186,360 (1,819) (46,701) (21,469) 124 $ 118,546
Balance (in shares) at Jun. 30, 2021 20,474,676            
Balance at Jun. 30, 2021 $ 2,047 186,138 (1,586) (46,116) (21,388) 142 119,237
Net income       (585)   (18) (603)
Stock option exercises (in shares) 38,668            
Stock option exercises $ 4 80         3
Stock-based compensation – stock options   131         131
Stock-based compensation - restricted stock   11         11
Foreign currency translation adjustments     (233)       $ (233)
Balance (in shares) at Sep. 30, 2021 20,513,344           16,080,749
Balance at Sep. 30, 2021 $ 2,051 $ 186,360 $ (1,819) $ (46,701) $ (21,469) $ 124 $ 118,546