Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on Recurring Basis

Following are the major categories of assets measured at fair value on a recurring basis (in thousands):

	Fair Value Measurements
	Fair Value		Level 1		Level 2		Level 3		Total
December 31, 2021
Money market funds (1)	$	226,006	$	226,006	$	—	$	—	$	226,006
U.S. treasury securities		52,432		52,432		—		—		52,432
Certificates of deposit		1,927		1,927		—		—		1,927
Total	$	280,365	$	280,365	$	—	$	—		280,365
December 31, 2020
Money market funds (1)	$	78,446	$	78,446	$	—	$	—	$	78,446
U.S. treasury securities		215,154		215,154		—		—		215,154
Total	$	293,600	$	293,600	$	—	$	—		293,600

(1) Included in cash and cash equivalents in accompanying balance sheets.