Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Schedule of Total Stock-Based Compensation

Total stock-based compensation was as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
	(in thousands)				(in thousands)
Cost of product revenue	$	263	$	162	$	718	$	303
Research and development		1,686		631		4,343		1,769
Sales and marketing		3,051		913		7,693		2,309
General and administrative		2,387		1,140		6,295		2,727
Total stock-based compensation	$	7,387	$	2,846	$	19,049	$	7,108

Schedule of Option Activity under 2009 Plan and 2019 Plan

Stock Options

Option activity under the 2009 Plan and 2019 Plan is set forth below:

	Shares Available for Grant		Number of Shares			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Term		Aggregate Intrinsic Value
								(in years)		(in thousands)
Balance, December 31, 2020		2,689,624		2,087,202		$	5.92		6.77	$	204,137
Awards authorized		1,040,530		—
Options exercised		—		(431,041	)		5.91
Options forfeited		15,062		(15,062	)		9.33
Balance, September 30, 2021		3,745,216		1,641,099		$	5.88		5.98	$	328,212
Vested and exercisable, September 30, 2021				1,339,978		$	4.88		5.72	$	269,338
Vested and expected to vest, September 30, 2021				1,641,099		$	5.88		5.98	$	328,212

Schedule of RSU Activity under 2019 Plan

RSU activity under the 2019 Plan is set forth below:

	Number of Shares			Weighted- Average Grant Date Fair Value Per Share
Balance, December 31, 2020		859,577		$	48.50
RSUs granted		557,355			137.41
RSUs vested		(205,807	)		42.98
RSUs forfeited		(47,266	)		75.16
Balance, September 30, 2021		1,163,859		$	90.97