Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Measurements

Schedule of assets measured on a recurring basis at fair value

	Level 1		Level 2		Level 3		Total
	(in thousands)
December 31, 2020
Cash equivalents
Certificate of deposits and time deposits	$	59,168	$	—	$	—	$	59,168
Commercial paper		—		2,000		—		2,000
U.S. treasuries		24,997		—		—		24,997
Total	$	84,165	$	2,000	$	—	$	86,165
Short-term investments
U.S. treasuries	$	149,219	$	—	$	—	$	149,219
Corporate debt		—		32,554		—		32,554
Commercial paper		—		7,998		—		7,998
Total	$	149,219	$	40,552	$	—	$	189,771
December 31, 2019
Cash equivalents
Certificate of deposits and time deposits	$	67,009	$	—	$	—	$	67,009
Commercial paper		—		10,484		—		10,484
Corporate debt		—		1,000		—		1,000
Total	$	67,009	$	11,484	$	—	$	78,493
Short-term investments
U.S. treasuries	$	105,130	$	—	$	—	$	105,130
Government agency securities		—		1,139		—		1,139
Corporate debt		—		6,002		—		6,002
Commercial paper		—		2,981		—		2,981
Total	$	105,130	$	10,122	$	—	$	115,252