Marketable Securities (Tables)

6 Months Ended

Jun. 30, 2022

Investments [Abstract]

Marketable Securities

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

	June 30, 2022
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Marketable securities
U.S. government securities	$	420,162	$	—	$	(9,713)	$	410,449
Commercial paper	18,972		—		—		18,972
Corporate debt securities	15,631		—		(179)		15,452
Total marketable securities	$	454,765	$	—	$	(9,892)	$	444,873

	December 31, 2021
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
Marketable securities
U.S. government 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:

	June 30, 2022				December 31, 2021
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due within one year	$	342,294	$	335,772	$	64,914	$	64,879
Due after one year through two years	112,471		109,101		390,090		387,996
Total	$	454,765	$	444,873	$	455,004	$	452,875