Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Consolidated Statements of Operations and Comprehensive Loss [Abstract]
Net sales		$ 15,990	$ 16,311	$ 42,281	$ 54,449
Cost of sales		6,701	7,462	17,883	23,985
Gross profit		9,289	8,849	24,398	30,464
Operating expenses		10,528	11,254	29,204	31,903
Impairment expense		0	0	1,078	0
Loss from operations		(1,239)	(2,405)	(5,884)	(1,439)
Other (income) expense:
Interest expense		2	0	2	32
Other, net		29	(62)	(75)	(7)
Total other (income) expense		31	(62)	(73)	25
Loss before income taxes		(1,270)	(2,343)	(5,811)	(1,464)
Benefit for income taxes		(288)	(624)	(1,316)	(390)
Net loss	[1]	(982)	(1,719)	(4,495)	(1,074)
Foreign currency translation adjustments, net of tax		133	(196)	(83)	205
Comprehensive loss		$ (849)	$ (1,915)	$ (4,578)	$ (869)
Net loss per common share:
Basic (in dollars per share)		$ (0.11)	$ (0.19)	$ (0.50)	$ (0.12)
Diluted (in dollars per share)		$ (0.11)	$ (0.19)	$ (0.50)	$ (0.12)
Weighted average number of shares outstanding:
Basic (in shares)	[1]	9,042,991	8,932,246	9,038,415	8,957,578
Diluted (in shares)	[1]	9,042,991	8,932,246	9,038,415	8,957,578

[1] For the three and nine months ended September 30, 2020, there were 1,875 and 7,422 shares, respectively, excluded from the diluted EPS calculation and for the three and nine months ended September 30, 2019, there were 2,704 and 5,200 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 those respective periods.