Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 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:

	June 30, 2020
(in thousands)	Level 1		Level 2		Level 3		Total
Cash and cash equivalents
Money market funds	$	55,178	$	—	$	—	$	55,178
	$	55,178	$	—	$	—	$	55,178
Short-term investments
Commercial paper	$	—	$	48,573	$	—	$	48,573
Corporate bonds	—		11,825		—		11,825
U.S. Treasury and agency obligations	—		45,236		—		45,236
	$	—	$	105,634	$	—	$	105,634

	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