Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Condensed Consolidated Statements of Operations and Comprehensive Income [Abstract]
Net sales	$ 20,360	$ 20,500
Cost of sales	8,541	8,569
Gross profit	11,819	11,931
Operating expenses	10,838	11,102
Income from operations	981	829
Other (income) expense:
Interest expense	0	2
Other, net	39	(15)
Total other income	39	(13)
Income before income taxes	942	842
Income tax provision	278	197
Net income	664	645
Foreign currency translation adjustments, net of tax	(39)	65
Comprehensive income	$ 625	$ 710
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)	8,303,117	8,574,888
Diluted (in shares)	8,356,166	8,580,182