Marketable Securities

6 Months Ended

Jun. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

9. Marketable Securities

The amortized cost, gross unrealized holding losses and fair value of available-for-sale debt securities by type of security as of June 30, 2022 and December 31, 2021 were as follows (in thousands):

	As of June 30, 2022
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
U.S. Government-related obligations	$	249,124	$	—	$	(817	)	$	248,307
	As of December 31, 2021
	Amortized Cost		Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
U.S. Government-related obligations	$	60,357	$	3	$	(2	)	$	60,358

All available-for-sale securities mature in one year or less.