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Marketable securities - Components (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Marketable securities
Amortized Cost	$ 89,562	$ 76,316
Gross Unrealized Gains	10	59
Gross Unrealized Losses	(134)	(45)
Fair Value	89,438	76,330
Corporate debt securities
Marketable securities
Amortized Cost	62,618	41,610
Gross Unrealized Gains	10	47
Gross Unrealized Losses	(127)	(45)
Fair Value	62,501	41,612
U.S. Treasury securities
Marketable securities
Amortized Cost	24,448	30,189
Gross Unrealized Gains		8
Gross Unrealized Losses	(6)
Fair Value	24,442	30,197
Government-sponsored securities
Marketable securities
Amortized Cost	2,496	4,517
Gross Unrealized Gains		4
Gross Unrealized Losses	(1)
Fair Value	$ 2,495	$ 4,521

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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