CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenues, net	$ 4,720	$ 6,094	$ 9,881	$ 12,402
Cost of revenues	3,203	3,175	6,531	6,416
Gross profit	1,517	2,919	3,350	5,986
Operating expenses
Sales and marketing	1,588	1,268	3,375	2,514
Research and development	2,980	2,667	5,897	5,066
General and administrative	2,545	1,995	5,014	3,864
Total operating expenses	7,113	5,930	14,286	11,444
Loss from operations	(5,596)	(3,011)	(10,936)	(5,458)
Other income, net	297	221	3,699	548
Loss before income taxes	(5,299)	(2,790)	(7,237)	(4,910)
Provision for (benefit from) income taxes	75	(289)	136	(197)
Net loss	(5,374)	(2,501)	(7,373)	(4,713)
Foreign currency translation adjustments	38	15	41	(36)
Comprehensive loss	$ (5,336)	$ (2,486)	$ (7,332)	$ (4,749)
Net loss per share available to common stockholders, basic (Note 11)	$ (0.34)	$ (0.23)	$ (0.47)	$ (0.44)
Net loss per share available to common stockholders, diluted (Note 11)	$ (0.34)	$ (0.23)	$ (0.47)	$ (0.44)
Weighted-average shares used to compute net loss per share available to common stockholders, basic	15,651	11,034	15,594	10,669
Weighted-average shares used to compute net loss per share available to common stockholders, diluted	15,651	11,034	15,594	10,669