Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue:
Product revenue	$ 93,631	$ 31,900
Cost of revenue:
Cost of product revenue	12,890	7,892
Gross profit	80,741	24,008
Operating expenses:
Research and development	17,019	10,277
Sales and marketing	35,961	23,992
General and administrative	12,389	7,226
Total operating expenses	65,369	41,495
Income (loss) from operations	15,372	(17,487)
Share in net loss of equity method investment	(47)	(5,523)
Interest expense	(297)	(312)
Other expense, net	(310)	(235)
Net income (loss) before taxes	14,718	(23,557)
Income tax expense	197	44
Net income (loss)	14,521	(23,601)
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities	(815)	7
Total comprehensive income (loss)	$ 13,706	$ (23,594)
Net income (loss) per share
Basic (USD per share)	$ 410	$ (680)
Diluted (USD per share)	$ 390	$ (680)
Shares used in computing net income (loss) per share
Basic (in shares)	35,587,337,000	34,797,400,000
Diluted (in shares)	37,623,477,000	34,797,400,000
Type of Revenue [Extensible List]	Product [Member]	Product [Member]
Type of Cost, Good Or Service [Extensible List]	Product [Member]	Product [Member]