Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue:
Revenue	$ 48,089	$ 29,541	$ 128,051	$ 92,840
Costs and expenses:
Cost of product revenue	30,686	13,723	83,314	44,353
Research and development	17,115	16,992	51,447	51,755
Selling, general and administrative	36,755	33,767	113,197	106,234
Total costs and expenses	84,556	64,482	247,958	202,342
Loss from operations	(36,467)	(34,941)	(119,907)	(109,502)
Other income (expense):
Interest income	1,355	774	4,167	1,331
Interest expense	(1,897)	(1,887)	(5,677)	(5,650)
Other expense, net	(451)	(579)	(669)	(1,286)
Total other expense, net	(993)	(1,692)	(2,179)	(5,605)
Net loss before provision for income tax	(37,460)	(36,633)	(122,086)	(115,107)
Benefit (provision) for income tax	49	(57)	(231)	(322)
Net loss	$ (37,411)	$ (36,690)	$ (122,317)	$ (115,429)
Net loss per share - basic (in dollars per share)	$ (0.78)	$ (0.79)	$ (2.58)	$ (2.49)
Net loss per share - diluted (in dollars per share)	$ (0.78)	$ (0.79)	$ (2.58)	$ (2.49)
Weighted average shares used in computing basic net loss per share (in shares)	47,715	46,529	47,341	46,320
Weighted average shares used in computing diluted net loss per share (in shares)	47,715	46,529	47,341	46,320
Product
Revenue:
Revenue	$ 41,905	$ 24,605	$ 111,937	$ 78,561
Costs and expenses:
Cost of product revenue	25,668	10,159	68,363	33,592
Service and other revenue
Revenue:
Revenue	6,184	4,936	16,114	14,279
Costs and expenses:
Cost of product revenue	$ 5,018	$ 3,564	$ 14,951	$ 10,761