Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements of Operations and Comprehensive Loss [Abstract]
Net sales		$ 64,084	$ 74,918
Cost of sales		28,026	32,959
Gross profit		36,058	41,959
Operating expenses		41,328	43,554
Impairment expense		1,078	1,002
Loss from operations		(6,348)	(2,597)
Other (income) expense:
Interest expense		7	36
Other, net		(76)	(40)
Total other income		(69)	(4)
Loss before income taxes		(6,279)	(2,593)
Benefit for income taxes		(1,378)	(690)
Net loss	[1]	(4,901)	(1,903)
Foreign currency translation adjustments, net of tax		(211)	363
Comprehensive loss		$ (5,112)	$ (1,540)
Net loss per common share:
Basic (in dollars per share)		$ (0.54)	$ (0.21)
Diluted (in dollars per share)		$ (0.54)	$ (0.21)
Weighted average number of shares outstanding:
Basic (in shares)	[1]	9,062,598	8,973,246
Diluted (in shares)	[1]	9,062,598	8,973,246

[1] For the years ended December 31, 2020 and 2019, there were 6,401 and 9,203 shares, respectively, 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.