Cash Equivalents and Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2020

Investments Debt And Equity Securities [Abstract]

Summary of Cash Equivalents and Marketable Securities

Cash equivalents and marketable securities consisted of the following as of March 31, 2020 and December 31, 2019 (in thousands):

	March 31, 2020
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Cash equivalents
Money market funds	$	54,841	$	—	$	—		$	54,841
Total cash equivalents		54,841		—		—			54,841
Short-term marketable securities
Corporate commercial paper		93,091		256		—			93,347
Corporate debt securities		142,848		99		(307	)		142,640
Government‑sponsored enterprise securities		15,994		61		—			16,055
Total short-term marketable securities		251,933		416		(307	)		252,042
Long-term marketable securities
Corporate debt securities		8,563		—		(29	)		8,534
Government‑sponsored enterprise securities		21,037		74		—			21,111
Total long-term marketable securities		29,600		74		(29	)		29,645
Total	$	336,374	$	490	$	(336	)	$	336,528

	December 31, 2019
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Cash equivalents
Money market funds	$	17,664	$	—	$	—		$	17,664
Corporate commercial paper		6,982		1		—			6,983
Corporate debt securities		10,205		—		(1	)		10,204
Total cash equivalents		34,851		1		(1	)		34,851
Short-term marketable securities
Corporate commercial paper		95,061		36		(9	)		95,088
Corporate debt securities		154,678		54		(42	)		154,690
Government‑sponsored enterprise securities		26,231		34		—			26,265
Total short-term marketable securities		275,970		124		(51	)		276,043
Long-term marketable securities
Corporate debt securities		14,194		8		—			14,202
Government‑sponsored enterprise securities		38,037		18		—			38,055
Total long-term marketable securities		52,231		26		—			52,257
Total	$	363,052	$	151	$	(52	)	$	363,151