Available-for-Sale Securities

6 Months Ended

Jun. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Available-for-Sale Securities

5. Available-for-Sale Securities

As of June 30, 2022, the fair value of available-for-sale securities by type of security was as follows:

	June 30, 2022
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Investments:
Treasury bills	$	56,979	$	—	$	(49	)	$	56,930
Corporate bond securities		51,715		—		(73	)		51,642
	$	108,694	$	—	$	(122	)	$	108,572

As of December 31, 2021, the fair value of available-for-sale securities by type of security was as follows:

	December 31, 2021
	Amortized Cost		Gross Unrealized Gain		Gross Unrealized Loss			Fair Value
Investments:
Treasury bill	$	2,800	$	—	$	—		$	2,800
Corporate bond securities		83,889		—		(45	)		83,844
Commercial paper		1,999		—		—			1,999
	$	88,688	$	—	$	(45	)	$	88,643

The estimated fair value and amortized cost of the Company’s available-for-sale securities as of June 30, 2022, by contractual maturity are summarized as follows:

	June 30, 2022
	Amortized Cost		Fair Value
Due in one year or less	$	108,694	$	108,572
Total available-for-sale securities	$	108,694	$	108,572

The weighted average maturity of the Company’s available-for-sale securities as of June 30, 2022 was approximately 0.4 years.

The estimated fair value and amortized cost of the Company’s available-for-sale securities as of December 31, 2021 by contractual maturity are summarized as follows:

	December 31, 2021
	Amortized Cost		Fair Value
Due in one year or less	$	88,688	$	88,643
Total available-for-sale securities	$	88,688	$	88,643

The weighted average maturity of the Company’s available-for-sale securities as of December 31, 2021 was approximately 0.7 years.