Condensed Consolidated Statements of Operations (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 7,753	$ 5,370
Cost of revenue	4,057	2,968
Gross profit	3,696	2,402
Operating expenses:
Research and development	1,978	1,424
Selling and marketing	1,597	1,272
General and administrative	2,035	1,529
Total operating expenses	5,610	4,225
Operating loss	(1,914)	(1,823)
Interest and other income, net	241	207
Loss before income taxes and equity loss in investee	(1,673)	(1,616)
Provision for income taxes	34	13
Loss before equity loss in investee	(1,707)	(1,629)
Equity loss in investee	(249)	(279)
Net loss	$ (1,956)	$ (1,908)
Net loss per common share:
Basic	$ (0.09)	$ (0.10)
Diluted	$ (0.09)	$ (0.10)
Weighted-average common shares:
Basic	21,566	18,228
Diluted	21,566	18,228