Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2022

Fair Value Disclosures [Abstract]

Summary of Assets Measured at Fair Value on Recurring Basis

The following table presents the balances of assets measured at fair value on a recurring basis, by level within the fair value hierarchy, as of the dates presented (in thousands):

	September 30, 2022						December 31, 2021
	Level 1		Level 2		Total		Level 1		Level 2		Total
Cash equivalents:
Money market funds	$	27,430	$	—	$	27,430	$	113,058	$	—	$	113,058
Total cash equivalents		27,430		—		27,430		113,058		—		113,058
Short-term investments:
U.S. government agency securities		—		75,681		75,681		—		4,066		4,066
Corporate notes and bonds		—		35,995		35,995		—		36,966		36,966
Commercial paper		—		18,291		18,291		—		16,489		16,489
Treasury bill		—		4,490		4,490		—		4,490		4,490
Yankee bonds				1,918		1,918		—		—		—
Asset-backed securities		—		6,166		6,166		—		7,432		7,432
Total short-term investments		—		142,541		142,541		—		69,443		69,443
Long-term investments:
U.S. government agency securities		—		17,346		17,346		—		14,225		14,225
Asset-backed securities		—		1,854		1,854		—		—		—
Total long-term investments		—		19,200		19,200		—		14,225		14,225
Total	$	27,430	$	161,741	$	189,171	$	113,058	$	83,668	$	196,726

Schedule of Cost Or Amortized Cost, Gross Unrealized Gains, Gross Unrealized Losses, And Total Estimated Fair Value Of Financial Assets

The following tables present the cost or amortized cost, gross unrealized gains, gross unrealized losses and total estimated fair value of our financial assets as of the dates presented (in thousands):

	September 30, 2022
	Cost or		Gross		Gross			Total Estimated
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Description:
Money market funds	$	27,430	$	—	$	—		$	27,430
U.S. government agency securities		94,276		—		(1,249	)		93,027
Corporate notes and bonds		36,374		—		(379	)		35,995
Yankee bonds		1,920		—		(2	)		1,918
Commercial paper		18,291		—		—			18,291
Treasury bill		4,500		—		(10	)		4,490
Asset-backed securities		8,110		—		(90	)		8,020
Total	$	190,901	$	—	$	(1,730	)	$	189,171

	December 31, 2021
	Cost or		Gross		Gross			Total Estimated
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Description:
Money market funds	$	113,058	$	—	$	—		$	113,058
U.S. government agency securities		18,314		—		(23	)		18,291
Corporate notes and bonds		36,975		3		(12	)		36,966
Commercial paper		16,489		—		—			16,489
Treasury bill		4,494		—		(4	)		4,490
Asset-backed securities		7,435		—		(3	)		7,432
Total	$	196,765	$	3	$	(42	)	$	196,726