Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis as of March 31, 2020 and December 31, 2019 were as follows (in thousands):

	March 31, 2020
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents
Money market funds	$	54,841	$	—	$	—	$	54,841
Short-term marketable securities
Corporate commercial paper		—		93,347		—		93,347
Corporate debt securities		—		142,640		—		142,640
Government‑sponsored enterprise securities		—		16,055		—		16,055
Long-term marketable securities
Corporate debt securities		—		8,534		—		8,534
Government‑sponsored enterprise securities		—		21,111		—		21,111
Total	$	54,841	$	281,687	$	—	$	336,528

	December 31, 2019
	Level 1		Level 2		Level 3		Total
Assets
Cash equivalents
Money market funds	$	17,664	$	—	$	—	$	17,664
Corporate commercial paper		—		6,983		—		6,983
Corporate debt securities		—		10,204		—		10,204
Short-term marketable securities
Corporate commercial paper		—		95,088		—		95,088
Corporate debt securities		—		154,690		—		154,690
Government‑sponsored enterprise securities		—		26,265		—		26,265
Long-term marketable securities
Corporate debt securities		—		14,202		—		14,202
Government‑sponsored enterprise securities		—		38,055		—		38,055
Total	$	17,664	$	345,487	$	—	$	363,151