Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue:
Revenue	$ 1,081,000	$ 994,000	$ 2,057,000	$ 2,060,000
Cost of revenue:
Cost of revenue	3,074,000	2,347,000	6,021,000	4,170,000
Gross loss	(1,993,000)	(1,353,000)	(3,964,000)	(2,110,000)
Operating expenses:
Research and development	8,980,000	7,253,000	19,119,000	13,681,000
Sales and marketing	4,449,000	3,602,000	9,002,000	7,321,000
General and administrative	5,124,000	4,992,000	10,592,000	10,525,000
Amortization of intangible assets	114,000	2,533,000	226,000	5,203,000
Change in fair value of contingent consideration	203,000	(598,000)	308,000	(752,000)
Property and equipment impairment	0	432,000	0	432,000
Total operating expenses	18,870,000	18,214,000	39,247,000	36,410,000
Operating loss	(20,863,000)	(19,567,000)	(43,211,000)	(38,520,000)
Interest income	431,000	260,000	870,000	515,000
Interest expense	0	(141,000)	0	(341,000)
Other expense, net	(242,000)	(86,000)	(460,000)	(232,000)
Total other income (expense), net	189,000	33,000	410,000	(58,000)
Loss before income taxes	(20,674,000)	(19,534,000)	(42,801,000)	(38,578,000)
Income tax benefit (expense)	12,000	(85,000)	(79,000)	(169,000)
Net loss	$ (20,662,000)	$ (19,619,000)	$ (42,880,000)	$ (38,747,000)
Net loss per common share attributable to common stockholders - basic and diluted (in dollars per share)	$ (0.09)	$ (0.08)	$ (0.18)	$ (0.16)
Weighted average number of shares used in computing net loss per common share - basic and diluted (in shares)	239,570	236,505	238,929	236,201
Comprehensive loss:
Net loss	$ (20,662,000)	$ (19,619,000)	$ (42,880,000)	$ (38,747,000)
Foreign currency translation gain (loss)	175,000	(1,713,000)	725,000	(2,363,000)
Unrealized gain (loss) on available-for-sale investments	99,000	(144,000)	406,000	(696,000)
Comprehensive loss	(20,388,000)	(21,476,000)	(41,749,000)	(41,806,000)
Product [Member]
Revenue:
Revenue	298,000	254,000	591,000	601,000
Cost of revenue:
Cost of revenue	1,612,000	883,000	2,837,000	1,259,000
Service [Member]
Revenue:
Revenue	289,000	424,000	484,000	732,000
Cost of revenue:
Cost of revenue	519,000	646,000	1,268,000	1,141,000
Lease [Member]
Revenue:
Revenue	494,000	316,000	982,000	727,000
Cost of revenue:
Cost of revenue	$ 943,000	$ 818,000	$ 1,916,000	$ 1,770,000