Investments in marketable securities (Tables)

3 Months Ended

Mar. 31, 2024

Investments, Debt and Equity Securities [Abstract]

Marketable securities

Investments in marketable securities consisted of the following:

	Amortized Cost		Gross Unrealized Gain(1)		Gross Unrealized Loss(1)		Fair Value
As of March 31, 2024	(in thousands)
Cash equivalents
Money market	$	14,365	$	—	$	—	$	14,365
US treasury bills	$	23,766	$	—	$	(1)	$	23,765
Total	$	38,131	$	—	$	(1)	$	38,130
Investments in marketable short-term securities
US government agency bonds	$	10,172	$	—	$	(17)	$	10,155
US corporate bonds	64,332		2		(138)		64,196
US treasury bills	9,801		—		(1)		9,800
Yankee bonds	2,000		—		(12)		1,988
Total	$	86,305	$	2	$	(168)	$	86,139
Investments in marketable long-term securities
US corporate bonds	8,697		—		(20)		8,677
Total	$	8,697	$	—	$	(20)	$	8,677

(1) Gross unrealized gain (loss) is pre-tax and is reported in accumulated other comprehensive loss.

	Amortized Cost		Gross Unrealized Gain(1)		Gross Unrealized Loss(1)		Fair Value
As of December 31, 2023	(in thousands)
Cash equivalents
Money market fund	$	18,029	$	—	$	—	$	18,029
Total	$	18,029	$	—	$	—	$	18,029
Investments in marketable short-term securities
US government agency bonds	$	17,918	$	—	$	(44)	$	17,874
US corporate bonds	71,045		30		(189)		70,886
Yankee bonds	2,000		—		(17)		1,983
US government bonds	$	9,001	$	—	$	(26)	$	8,975
Total	$	99,964	$	30	$	(276)	$	99,718
Investments in marketable long-term securities
US corporate bonds	6,273		18		(7)		6,284
Total	$	6,273	$	18	$	(7)	$	6,284

(1) Gross unrealized gain (loss) is pre-tax and is reported in accumulated other comprehensive loss.