Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Condensed Consolidated Statements of Operations and Comprehensive Income [Abstract]
Net sales	$ 20,500	$ 21,394
Cost of sales	8,569	9,208
Gross profit	11,931	12,186
Operating expenses	11,102	11,221
Income from operations	829	965
Other (income) expense:
Interest expense	2	5
Other, net	(15)	(8)
Total other income	(13)	(3)
Income before income taxes	842	968
Income tax provision	197	223
Net income	645	745
Foreign currency translation adjustments, net of tax	65	(33)
Comprehensive income	$ 710	$ 712
Net income per common share:
Basic (in dollars per share)	$ 0.08	$ 0.08
Diluted (in dollars per share)	$ 0.08	$ 0.08
Weighted average number of shares outstanding:
Basic (in shares)	8,574,888	8,811,752
Diluted (in shares)	8,580,182	8,811,752