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RESTATEMENT OF PREVIOUSLY ISSUED CONSOLIDATED FINANCIAL STATEMENTS, Consolidated Statement of Operations and Comprehensive Income (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Income Statement [Abstract]    
Net sales $ 17,145 $ 20,941 [1]
Cost of sales 7,279 8,696 [1]
Gross profit 9,866 12,245 [1]
Operating expenses 11,096 10,032 [1]
Income (loss) from operations (2,299) 2,213 [1]
Other (income) expense [Abstract]    
Interest expense 0 32 [1]
Other, net (53) 110 [1]
Total other (income) expense (53) 142 [1]
Income (loss) before income taxes (2,246) 2,071 [1]
Income tax expense (508) 551 [1]
Net income (loss) (1,738) [2] 1,520 [1]
Foreign currency translation adjustments, net of tax (346) 314 [1]
Comprehensive income (loss) $ (2,084) $ 1,834 [1]
Net income per common share [Abstract]    
Basic (in dollars per share) $ (0.19) $ 0.17 [1]
Diluted (in dollars per share) $ (0.19) $ 0.17 [1]
Weighted average number of shares outstanding [Abstract]    
Basic (in shares) 9,029,212 [2] 9,009,752 [1]
Diluted (in shares) 9,029,212 [2] 9,011,107 [1]
As Reported [Member]    
Income Statement [Abstract]    
Net sales   $ 20,785
Cost of sales   8,334
Gross profit   12,451
Operating expenses   11,282
Income (loss) from operations   1,169
Other (income) expense [Abstract]    
Interest expense   32
Other, net   (33)
Total other (income) expense   (1)
Income (loss) before income taxes   1,170
Income tax expense   301
Net income (loss)   869
Foreign currency translation adjustments, net of tax   287
Comprehensive income (loss)   $ 1,156
Net income per common share [Abstract]    
Basic (in dollars per share)   $ 0.10
Diluted (in dollars per share)   $ 0.10
Weighted average number of shares outstanding [Abstract]    
Basic (in shares)   9,009,752
Diluted (in shares)   9,010,037
Adjustments [Member]    
Income Statement [Abstract]    
Net sales   $ 156
Cost of sales   362
Gross profit   (206)
Operating expenses   (1,250)
Income (loss) from operations   1,044
Other (income) expense [Abstract]    
Interest expense   0
Other, net   143
Total other (income) expense   143
Income (loss) before income taxes   901
Income tax expense   250
Net income (loss)   651
Foreign currency translation adjustments, net of tax   27
Comprehensive income (loss)   $ 678
Net income per common share [Abstract]    
Basic (in dollars per share)   $ 0.07
Diluted (in dollars per share)   $ 0.07
Weighted average number of shares outstanding [Abstract]    
Basic (in shares)   9,009,752
Diluted (in shares)   9,011,107
[1] As described in Note 2 to these Consolidated Financial Statements, we have restated the consolidated financial statements for the three months ended March 31, 2019
[2] For the three months ended March 31, 2020, there were 492 shares excluded from the diluted EPS calculation because the impact of their assumed vesting would be anti-dilutive due to a net loss in that period.