Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Equity Securities [Abstract]
Investments	$ 143,358	$ 66,628
Swedish treasury securities
Debt Securities [Abstract]
Debt Securities, Available-for-Sale	114,754	64,934
Finnish corporate notes
Debt Securities [Abstract]
Debt Securities, Available-for-Sale	27,162	0
Private equity funds
Equity Securities [Abstract]
Equity Securities, FV-NI, Current	$ 1,442	$ 1,694