Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2022		Sep. 30, 2021		Sep. 30, 2022	Sep. 30, 2021
Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) [Abstract]
Net sales	$ 19,057		$ 19,281		$ 57,967	$ 59,241
Cost of sales	7,461		8,192		23,939	24,685
Gross profit	11,596		11,089		34,028	34,556
Operating expenses	10,620		11,078		32,959	32,856
Income from operations	976		11		1,069	1,700
Other (income) expense:
Interest (income) expense	1		2		11	12
Other, net	(6)		23		1	37
Total other (income) expense	(5)		25		12	49
Income (loss) before income taxes	981		(14)		1,057	1,651
Provision (benefit) for income taxes	258		2		278	382
Net income (loss)	723		(16)		779	1,269
Foreign currency translation adjustments, net of tax	(441)		(90)		(629)	(54)
Comprehensive income (loss)	$ 282		$ (106)		$ 150	$ 1,215
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.09		$ 0		$ 0.09	$ 0.15
Diluted (in dollars per share)	$ 0.09		$ 0		$ 0.09	$ 0.15
Weighted average number of shares outstanding:
Basic (in shares)	8,235,610		8,663,921		8,361,959	8,712,939
Diluted (in shares)	8,272,557	[1]	8,663,921	[1]	8,383,558	8,718,068

[1] (1)  For the three months ended September 30, 2022, there were 178 shares excluded from the diluted EPS calculation, because the impact of their assumed vesting would be anti-dilutive. For the three months ended September 30, 2021, there were 15,326 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.