Collaboration and License Agreements - Schedule of Receivables and Contract Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Sep. 30, 2025	Dec. 31, 2024
Collaboration And License Agreements [Abstract]
Receivables included in accounts receivable	$ 218,354	$ 6,824
Contract assets included in other current assets	9,827	0	$ 0
Contract liabilities included in deferred revenue, current	111,933	2,399	0
Contract liabilities included in deferred revenue, non-current	$ 53,825	$ 0	$ 0