Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenue	$ 28,967	$ 29,069
Cost of goods sold	17,051	16,510
Gross profit	11,916	12,559
Operating expenses:
Sales and marketing	6,736	6,728
Research and product development	5,794	5,512
General and administrative	6,881	5,886
Total operating expenses	19,411	18,126
Operating loss	(7,495)	(5,567)
Interest expense	(514)	(436)
Other income, net	32	79
Loss before income taxes	(7,977)	(5,924)
Provision for (benefit from) income taxes	(283)	(6,429)
Net income (loss)	$ (7,694)	$ 505
Basic income (loss) per common share (in dollars per share)	$ (0.39)	$ 0.03
Diluted income (loss) per common share (in dollars per share)	$ (0.39)	$ 0.03
Basic weighted average shares outstanding (in shares)	19,859,817	17,271,629
Diluted weighted average shares outstanding (in shares)	19,859,817	17,325,351
Comprehensive income (loss):
Net income (loss)	$ (7,694)	$ 505
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities, net of tax	(28)	8
Change in foreign currency translation adjustment	(27)	(18)
Comprehensive income (loss)	$ (7,749)	$ 495