CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenues, net	$ 6,308	$ 8,660
Cost of revenues	3,241	5,345
Gross profit	3,067	3,315
Operating expenses
Sales and marketing	1,246	2,312
Research and development	2,399	3,437
General and administrative	1,869	1,981
Total operating expenses	5,514	7,730
Loss from operations	(2,447)	(4,415)
Other income, net	327	469
Loss before provision for income taxes	(2,120)	(3,946)
Provision for income taxes	92	25
Net loss	(2,212)	(3,971)
Foreign currency translation adjustments	(51)	83
Comprehensive loss	$ (2,263)	$ (3,888)
Net loss per share available to common stockholders, basic and diluted (Note 11)	$ (0.21)	$ (0.58)
Weighted-average shares used to compute net loss per share available to common stockholders, basic and diluted	10,300	6,819