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Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2022

The amortized cost, unrealized gain (loss), and estimated fair value of the Company's investments in securities available for sale consisted of the following:


	December 31, 2022
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Marketable securities
U.S. treasury securities	$	384,951	$	—	$	(6,949)	$	378,002
U.S. agency securities	29,012		47		—		29,059
Commercial paper	28,815		—		—		28,815

Corporate debt securities	5,049		—		(67)		4,982
Total marketable securities	$	447,827	$	47	$	(7,016)	$	440,858


	December 31, 2021
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Marketable securities
U.S. treasury securities	$	420,392	$	—	$	(2,107)	$	418,285
Commercial paper	13,878		—		—		13,878
Asset-backed securities	2,003		—		(1)		2,002
Corporate debt securities	18,731		3		(24)		18,710
Total marketable securities	$	455,004	$	3	$	(2,132)	$	452,875

Schedule of Available-for-sale Securities Reconciliation

The following table summarizes the stated maturities of the Company’s marketable securities:


	December 31, 2022				December 31, 2021
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value

Due within one year	$	447,827	$	440,858	$	64,914	$	64,879
Due after one year through two years	—		—		390,090		387,996
Total	$	447,827	$	440,858	$	455,004	$	452,875