Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of assets measured at fair value on recurring basis

The following tables summarize assets that are measured at fair value on a recurring basis:

	March 31, 2020
(in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents
Money market funds	$	40,395	$	—	$	—	$	40,395
	$	40,395	$	—	$	—	$	40,395
Short-term investments
Commercial paper	$	—	$	52,984	$	—	$	52,984
Corporate bonds	—		20,672		—		20,672
U.S. Treasury and agency obligations	—		45,268		—		45,268
	$	—	$	118,924	$	—	$	118,924

	December 31, 2019
(in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents
Money market funds	$	13,588	$	—	$	—	$	13,588
Commercial paper	—		8,987		—		8,987
	$	13,588	$	8,987	$	—	$	22,575
Short-term investments
Commercial paper	$	—	$	61,371	$	—	$	61,371
Corporate bonds	—		23,869		—		23,869
U.S. Treasury and agency obligations	—		52,664		—		52,664
	$	—	$	137,904	$	—	$	137,904