Marketable Securities

6 Months Ended

Jun. 30, 2022

Investments, Debt and Equity Securities [Abstract]

Marketable Securities

4. MARKETABLE SECURITIES

The amortized cost, gross unrealized holding gains, gross unrealized holding losses and fair value of our marketable securities by type of security as of June 30, 2022 was as follows:
 

	JUNE 30, 2022
(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
U.S. treasury securities	$	86,986	$	—	$	(371	)	$	86,615
Money market funds		13,773		—		—			13,773
	$	100,759	$	—	$	(371	)	$	100,388

The fair values of marketable securities by classification in the condensed consolidated balance sheets was as follows:
 

(in thousands)	JUNE 30, 2022
Cash and cash equivalents	$	13,773
Marketable securities		86,615
	$	100,388

The fair values of available-for-sale debt securities as of June 30, 2022 , by contractual maturity, are summarized as follows:
 

(in thousands)	JUNE 30, 2022
Due in one year or less	$	100,388
Due after one year through two years		—
	$	100,388

The aggregate fair value of available-for-sale debt securities in an unrealized loss position as of June 30, 2022 was $86.6 million. We did not have any investments in a continuous unrealized loss position for more than twelve months as of June 30, 2022. As of June 30, 2022, we believe that the cost basis of our available-for-sale debt securities is recoverable. No allowance for credit losses was recorded as of June 30, 2022.