Investments and Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2024

Investments and Fair Value Measurements

Schedule of available-for-sale securities

		June 30, 2024
				Gross		Gross
		Amortized		Unrealized		Unrealized		Estimated
(In thousands)		Cost		Gains		Losses		Fair Value
US government securities	Level 1	$	22,260	$	—	$	(2)	$	22,258
Commercial paper	Level 2		39,432		—		(20)		39,412
Marketable securities			61,692		—		(22)		61,670
Money market funds	Level 1		24,842		—		—		24,842
Total		$	86,534	$	—	$	(22)	$	86,512

		December 31, 2023
				Gross		Gross
		Amortized		Unrealized		Unrealized		Estimated
(In thousands)		Cost		Gains		Losses		Fair Value
US government securities	Level 1	$	29,848	$	—	$	(29)	$	29,819
US government agency securities	Level 2		4,428		—		(8)		4,420
Corporate notes	Level 2		28,670		4		(32)		28,642
Marketable securities			62,946		4		(69)		62,881
Money market funds	Level 1		26,179		—		—		26,179
Total		$	89,125	$	4	$	(69)	$	89,060

Schedule of Available for sale debt securities with unrealized losses

	June 30, 2024
	Less than 12 Months				Greater than 12 Months				Total
			Gross				Gross				Gross
	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
(In thousands)	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
US government securities	$	19,283	$	(2)	$	—	$	—	$	19,283	$	(2)
Commercial paper		39,412		(20)		—		—		39,412		(20)
Total	$	58,695	$	(22)	$	—	$	—	$	58,695	$	(22)

	December 31, 2023
	Less than 12 Months				Greater than 12 Months				Total
			Gross				Gross				Gross
	Estimated		Unrealized		Estimated		Unrealized		Estimated		Unrealized
(In thousands)	Fair Value		Losses		Fair Value		Losses		Fair Value		Losses
US government securities	$	29,819	$	(29)	$	—	$	—	$	29,819	$	(29)
US government agency securities		4,420		(8)		—		—		4,420		(8)
Corporate notes		23,641		(32)		—		—		23,641		(32)
Total	$	57,880	$	(69)	$	—	$	—	$	57,880	$	(69)

Schedule of Changes to the Contingent liability

(In thousands)
Balance at December 31, 2023	$	27,788
Non-cash interest expense accretion		1,273
Balance at June 30, 2024	$	29,061