Condensed Consolidated Statements of Operations (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
Revenue:
Total revenue	$ 6,670	$ 3,856	$ 12,366	$ 7,024
Cost of revenue:
Total cost of revenue	5,199	2,417	10,034	4,542
Operating expenses:
Research and development	11,767	4,086	22,296	6,765
Selling, general and administrative	21,783	13,829	42,060	23,357
Total operating expenses	33,550	17,915	64,356	30,122
Loss from operations	(32,079)	(16,476)	(62,024)	(27,640)
Other income (expense):
Interest income	192	58	301	123
Interest expense	(74)	(268)	(151)	(871)
Gain on forgiveness of Paycheck Protection Program loan	0	0	0	1,775
Loss on debt extinguishment	0	(2,076)	0	(2,076)
Other income (expense)	(156)	(15)	(188)	(29)
Total other income (expense)	(38)	(2,301)	(38)	(1,078)
Loss before income taxes	(32,117)	(18,777)	(62,062)	(28,718)
Benefit (provision) for income taxes	(41)	(9)	(50)	(15)
Net loss	$ (32,158)	$ (18,786)	$ (62,112)	$ (28,733)
Net loss per share, basic (in dollars per share)	$ (0.11)	$ (0.07)	$ (0.22)	$ (0.11)
Net loss per share, diluted (in dollars per share)	$ (0.11)	$ (0.07)	$ (0.22)	$ (0.11)
Weighted-average common shares outstanding, basic (in shares)	285,554	278,898	285,086	271,460
Weighted-average common shares outstanding, diluted (in shares)	285,554	278,898	285,086	271,460
Product revenue
Revenue:
Total revenue	$ 3,913	$ 2,496	$ 7,029	$ 4,545
Cost of revenue:
Total cost of revenue	3,973	1,869	7,549	3,383
Service and other revenue
Revenue:
Total revenue	2,757	1,360	5,337	2,479
Cost of revenue:
Total cost of revenue	$ 1,226	$ 548	$ 2,485	$ 1,159