Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenue	$ 25,042	$ 28,156
Cost of goods sold	13,849	14,785
Gross profit	11,193	13,371
Operating expenses:
Sales and marketing	7,935	9,908
Research and product development	5,775	7,840
General and administrative	6,045	5,950
Total operating expenses	19,755	23,698
Operating loss	(8,562)	(10,327)
Other income, net	210	80
Loss before income taxes	(8,352)	(10,247)
Provision for income taxes	56	6,440
Net loss	$ (8,408)	$ (16,687)
Basic loss per common share (in dollars per share)	$ (0.51)	$ (1.87)
Diluted loss per common share (in dollars per share)	$ (0.51)	$ (1.87)
Basic weighted average shares outstanding (in shares)	16,638,580	8,942,629
Diluted weighted average shares outstanding (in shares)	16,638,580	8,942,629
Comprehensive loss:
Net loss	$ (8,408)	$ (16,687)
Other comprehensive income/loss:
Unrealized gain (loss) on available-for-sale securities, net of tax	68	(38)
Change in foreign currency translation adjustment	(63)	(78)
Comprehensive loss	$ (8,403)	$ (16,803)