Marketable Debt Securities

6 Months Ended

Jun. 30, 2024

Investments, Debt and Equity Securities [Abstract]

Marketable Debt Securities

4. Marketable Debt Securities

Marketable debt securities, all of which were classified as available-for-sale, consist of the following (in thousands):

	June 30, 2024
	Amortized Cost		Unrealized Gains		Unrealized Losses			Aggregate Fair Value
Marketable debt securities
U.S. Treasury securities	$	130,756	$	-	$	(106	)	$	130,650
	December 31, 2023
	Amortized Cost		Unrealized Gains		Unrealized Losses			Aggregate Fair Value
Marketable debt securities
U.S. Treasury securities	$	109,571	$	71	$	(8	)	$	109,634

As of June 30, 2024, the remaining contractual terms of the U.S. Treasury securities were less than 12 months.

To date, the Company has not recognized any allowances for credit losses or impairments in relation to its marketable securities as these securities are comprised of high credit quality, investment grade securities that the Company does not intend or expect to be required to sell prior to their anticipated recovery, and the decline in fair value of these securities is attributable to factors other than credit losses.

Interest and investment income consists of the following (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Interest income	$	387	$	396	$	649	$	1,462
Accretion of discount, net		1,636		1,260		2,924		1,867
Total interest and investment income	$	2,023	$	1,656	$	3,573	$	3,329