Fair Value of Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Financial Assets, Fair Value Disclosure [Abstract]
Cash equivalents	$ 646,347	$ 255,280
Financial assets	1,074,959	409,036
Financial Liabilities Fair Value Disclosure [Abstract]
Financial liabilities	121,868	43,513
Directors' Deferred Share Unit Liability
Financial Liabilities Fair Value Disclosure [Abstract]
Financial liabilities	8,851	2,608
2022 USD Financing Warrant Liability
Financial Liabilities Fair Value Disclosure [Abstract]
Financial liabilities	113,017	40,905
Level 1
Financial Assets, Fair Value Disclosure [Abstract]
Cash equivalents	646,347	255,280
Financial assets	646,347	255,280
Financial Liabilities Fair Value Disclosure [Abstract]
Financial liabilities	8,851	2,608
Level 1 \| Directors' Deferred Share Unit Liability
Financial Liabilities Fair Value Disclosure [Abstract]
Financial liabilities	8,851	2,608
Level 2
Financial Assets, Fair Value Disclosure [Abstract]
Financial assets	428,612	153,756
Level 3
Financial Liabilities Fair Value Disclosure [Abstract]
Financial liabilities	113,017	40,905
Level 3 \| 2022 USD Financing Warrant Liability
Financial Liabilities Fair Value Disclosure [Abstract]
Financial liabilities	113,017	40,905
U.S. agency bonds
Financial Assets, Fair Value Disclosure [Abstract]
Cash equivalents	428,612	153,756
U.S. agency bonds \| Level 2
Financial Assets, Fair Value Disclosure [Abstract]
Cash equivalents	$ 428,612	$ 153,756