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Investments in marketable securities - Marketable Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Cash and Cash Equivalents [Abstract]
Cash Equivalents, at Carrying Value	$ 7,838	$ 29,533
Cash Equivalents, Fair Value Disclosure	7,838	29,533
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	71,237	86,243
Gross Unrealized Gain	61	56
Gross Unrealized Loss	(4)	(6)
Fair Value	71,294	86,293
Short Term Marketable Securities
Debt Securities, Available-for-Sale [Abstract]
Fair Value	71,300	86,300
Money market funds
Cash and Cash Equivalents [Abstract]
Money Market Funds, at Carrying Value	7,838	29,533
US corporate bonds
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	3,059	30,776
Gross Unrealized Gain	3	27
Gross Unrealized Loss	0	(6)
Fair Value	3,062	30,797
US treasury bills
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	37,981	55,467
Gross Unrealized Gain	31	29
Gross Unrealized Loss	(1)	0
Fair Value	38,011	$ 55,496
US government bonds | Short Term Marketable Securities
Debt Securities, Available-for-Sale [Abstract]
Amortized Cost	30,197
Gross Unrealized Gain	27
Gross Unrealized Loss	(3)
Fair Value	$ 30,221

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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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