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Investments in marketable securities - Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Cash and Cash Equivalents [Abstract]
Cash Equivalents, at Carrying Value	$ 30,400	$ 29,533
Cash Equivalents, Fair Value Disclosure	30,400	29,533
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	60,678	86,243
Gross Unrealized Gain	9	56
Gross Unrealized Loss	(11)	(6)
Fair Value	60,676	86,293
Short Term Marketable Securities
Debt Securities, Available-for-Sale [Abstract]
Fair Value	60,700	86,300
Money market funds
Cash and Cash Equivalents [Abstract]
Money Market Funds, at Carrying Value	30,400	29,533
US corporate bonds
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	11,300	30,776
Gross Unrealized Gain	9	27
Gross Unrealized Loss	0	(6)
Fair Value	11,309	30,797
US treasury bills
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	47,128	55,467
Gross Unrealized Gain	0	29
Gross Unrealized Loss	(10)	0
Fair Value	47,118	$ 55,496
US government bonds | Short Term Marketable Securities
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	2,250
Gross Unrealized Gain	0
Gross Unrealized Loss	(1)
Fair Value	$ 2,249

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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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Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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