Significant agreements - Bayer Collaboration Agreement - Accounting Analysis (Details) - Bayer Collaboration Agreement $ in Thousands	May 04, 2023 USD ($) item	Nov. 30, 2025 USD ($)
Significant agreements.
Transaction price	$ 47,500	$ 40,219
Combined performance obligation related to the licenses and research and development services associated with radiopharmaceutical compounds directed to the remaining initial target
Significant agreements.
Combined performance obligations \| item	2
Transaction price		10,125
Material right associated with limited substitution rights for the remaining initial target
Significant agreements.
Transaction price		2,206
Material right associated with the option to progress radiopharmaceutical candidates directed to the remaining initial target into further development
Significant agreements.
Number of material rights \| item	2
Transaction price		10,614
Material right associated with the option to progress a non-radiopharmaceutical compound directed to the remaining initial target
Significant agreements.
Number of material rights \| item	2
Transaction price		6,288
Material right for the option to expand the collaboration to include an additional target and the underlying additional option rights
Significant agreements.
Transaction price		$ 10,986