Balance Sheet Details (Tables)

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Summary of Short-Term Investments

The following is a summary of our short-term investments (in thousands):

	December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. corporate debt	$	15,009	$	—	$	(3	)	$	15,006
Foreign corporate debt		10,551		—		(3	)		10,548
U.S. commercial paper		5,998		—		—			5,998
Foreign commercial paper		35,487		—		—			35,487
Total	$	67,045	$	—	$	(6	)	$	67,039

	December 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
U.S. treasury bills and government agency obligations	$	20,110	$	166	$	—	$	20,276
U.S. corporate debt securities		11,505		42		—		11,547
Foreign corporate debt securities		15,508		49		—		15,557
U.S. commercial paper		13,997		—		—		13,997
Foreign commercial paper		41,976		—		—		41,976
Total	$	103,096	$	257	$	—	$	103,353

Schedule of Inventory

Inventory consists of the following (in thousands):

	December 31,
	2021		2020
Raw materials	$	21,193	$	18,994
Work in process		20,935		6,847
Finished goods		6,254		16,064
Total inventory	$	48,382	$	41,905

Schedule of Prepaid Expenses and Other Assets

Prepaid expenses and other assets consist of the following (in thousands):

	December 31,
	2021		2020
Prepaid expenses	$	28,048	$	19,461
Prepaid insurance		2,135		2,155
Deposits		254		346
Interest receivable		245		334
Total prepaid expenses and other assets	$	30,682	$	22,296

Schedule of Property and Equipment, Net

Property and equipment, net consists of the following (in thousands):

	December 31,
	2021			2020
Scientific equipment	$	33,403		$	29,135
Leasehold improvements		610			878
Computer equipment and software		1,497			1,461
Furniture, fixtures and office equipment		1,467			2,135
Property and equipment, gross		36,977			33,609
Less: accumulated depreciation and amortization		(13,243	)		(10,872	)
Property and equipment, net	$	23,734		$	22,737

Schedule of Accrued Liabilities

Accrued payroll and employee liabilities consist of the following (in thousands):

	December 31,
	2021		2020
Accrued employee salaries and benefits	$	1,784	$	1,691
Accrued bonuses		9,439		8,479
Accrued vacation		4,040		3,427
Total accrued payroll and employee liabilities	$	15,263	$	13,597

Other accrued liabilities consist of the following (in thousands):

	December 31,
	2021		2020
Accrued product sales allowances	$	22,560	$	24,571
Accrued consulting and professional fees		2,666		3,450
Accrued accounts payable		70		104
Other accrued liabilities		563		244
Total other accrued liabilities	$	25,859	$	28,369