Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2020

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value on Recurring Basis

As of September 30, 2020, the Company held certain assets that are required to be measured at fair value on a recurring basis, as follows:

			Fair Value Measurement as of September 30, 2020 Using
	Total Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(in thousands)			(Level 1)		(Level 2)		(Level 3)
U.S. Treasury and government agencies	$	151,501	$	151,501	$	—	$	—
Corporate debt	140,074		—		140,074		—
Total assets measured at fair value	$	291,575	$	151,501	$	140,074	$	—

As of December 31, 2019, the Company held certain assets that are required to be measured at fair value on a recurring basis, as follows:

			Fair Value Measurement as of December 31, 2019 Using
	Total Fair Value		Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
(in thousands)			(Level 1)		(Level 2)		(Level 3)
U.S. Treasury and government agencies	$	88,601	$	88,601	$	—	$	—
Corporate debt	137,025		—		137,025		—
Asset-backed securities	48,401		—		48,401		—
Total assets measured at fair value	$	274,027	$	88,601	$	185,426	$	—