Cash, Cash Equivalents and Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2021

Cash And Cash Equivalents [Abstract]

Summary of Cash, Cash Equivalents and Marketable Securities

Cash, cash equivalents and marketable securities consisted of the following (in thousands):

	September 30, 2021
	Amortized cost		Unrealized gains		Unrealized losses			Estimated Fair Value
Cash and cash equivalents:
Cash	$	21,548	$	—	$	—		$	21,548
Money market funds		81,974		—		—			81,974
Commercial paper		5,000		—		—			5,000
Total cash and cash equivalents	$	108,522	$	—	$	—		$	108,522
Marketable securities:
Commercial paper	$	45,479	$	2	$	(3	)	$	45,478
U.S. government and agency securities		37,155		9		—			37,164
Corporate debt securities		13,616		—		(6	)		13,610
Total marketable securities	$	96,250	$	11	$	(9	)	$	96,252

	December 31, 2020
	Amortized cost		Unrealized gains		Unrealized losses			Estimated Fair Value
Cash and cash equivalents:
Cash	$	5,659	$	—	$	—		$	5,659
Money market funds		113,592		—		—			113,592
Certificate of deposit		157		—		—			157
Commercial paper		40,844		—		—			40,844
U.S. government and agency securities		27,498		—		—			27,498
Total cash and cash equivalents	$	187,750	$	—	$	—		$	187,750
Marketable securities:
Commercial paper	$	35,089	$	—	$	—		$	35,089
U.S. government and agency securities		26,026		6		(3	)		26,029
Corporate debt securities		1,504		—		—			1,504
Total marketable securities	$	62,619	$	6	$	(3	)	$	62,622

Summary of Amortized Cost and Estimated Fair Value of Available-for-Sale Marketable Securities by Contractual Maturity

The amortized cost and estimated fair value of our available-for-sale marketable securities by contractual maturity are summarized below as of September 30, 2021 (in thousands):

	Amortized cost		Unrealized gains		Unrealized losses			Estimated Fair Value
Mature in one year or less	$	75,513	$	5	$	(5	)	$	75,513
Mature after one year through two years		20,737		6		(4	)		20,739
Total available-for-sale marketable securities	$	96,250	$	11	$	(9	)	$	96,252