CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Revenues, net	$ 4,977	$ 6,155	$ 14,858	$ 18,557
Cost of revenues	3,181	3,175	9,712	9,591
Gross profit	1,796	2,980	5,146	8,966
Operating expenses
Sales and marketing	1,660	1,266	5,035	3,780
Research and development	3,034	2,677	8,931	7,743
General and administrative	2,923	2,312	7,937	6,176
Total operating expenses	7,617	6,255	21,903	17,699
Loss from operations	(5,821)	(3,275)	(16,757)	(8,733)
Other income, net	190	298	3,889	846
Loss before income taxes	(5,631)	(2,977)	(12,868)	(7,887)
Provision for (benefit from) income taxes	105	153	241	(44)
Net loss	(5,736)	(3,130)	(13,109)	(7,843)
Foreign currency translation adjustments	42	26	83	(10)
Comprehensive loss	$ (5,694)	$ (3,104)	$ (13,026)	$ (7,853)
Net loss per share available to common stockholders, basic (Note 11)	$ (0.36)	$ (0.22)	$ (0.83)	$ (0.66)
Net loss per share available to common stockholders, diluted (Note 11)	$ (0.36)	$ (0.22)	$ (0.83)	$ (0.66)
Weighted-average shares used to compute net loss per share available to common stockholders, basic	16,030	14,500	15,741	11,956
Weighted-average shares used to compute net loss per share available to common stockholders, diluted	16,030	14,500	15,741	11,956