Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2020

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	September 30, 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	$	177,753	$	177,753	$	—	$	—
Total cash equivalents	$	177,753	$	177,753	$	—	$	—
Description	December 31, 2019		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	$	39,524	$	39,524	$	—	$	—
Repurchase agreements		14,000		—		14,000		—
Total cash equivalents	$	53,524	$	39,524	$	14,000	$	—
Short-term investments:
Asset-backed securities	$	14,876	$	—	$	14,876	$	—
Commercial paper		41,259		—		41,259		—
U.S. Treasury securities		59,971		—		59,971		—
Corporate debt securities		92,508		—		92,508		—
Total short-term investments	$	208,614	$	—	$	208,614	$	—
Total financial assets	$	262,138	$	39,524	$	222,614	$	—