Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on Recurring Basis

Assets measured at fair value on a recurring basis were as follows:

Description	March 31, 2021		Quoted Prices (Unadjusted) in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Cash equivalents:
Money market mutual funds	$	104,166	$	104,166	$	—	$	—
Total cash equivalents	$	104,166	$	104,166	$	—	$	—
Short-term investments:
Commercial paper	$	48,941	$	—	$	48,941	$	—
Corporate debt securities		35,292		—		35,292		—
Total short-term investments	$	84,233	$	—	$	84,233	$	—
Total financial assets	$	188,399	$	104,166	$	84,233	$	—
Description	December 31, 2020		Quoted Prices (Unadjusted) in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
	(in thousands)
Cash equivalents:
Money market mutual funds	$	217,181	$	217,181	$	—	$	—
Total financial assets	$	217,181	$	217,181	$	—	$	—