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Fair Value Measurements - Milestone Asset, Milestone Contingent Consideration and PRV Interest and Warrants (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended
	Feb. 24, 2025	Feb. 28, 2025	Mar. 31, 2026	Dec. 31, 2025
Fair Value Measurements
Exarafenib milestone asset (Note 6)			$ 3,704	$ 3,600
Exarafenib milestone contingent consideration			3,704	3,600
Fair value of warrants			709	697
Fair value of the share-based liability				3,197
Level 3
Fair Value Measurements
Fair value of the share-based liability			0	3,200
Kinnate CVR holders \| CVR Agreement
Fair Value Measurements
Exarafenib milestone asset (Note 6)			3,700
Exarafenib milestone contingent consideration			3,700	$ 3,600
Increase in Exarafenib milestone asset			100
Increase in Exarafenib milestone contingent consideration			100
Castle Creek Biosciences, Inc \| Royalty Financing Transaction
Fair Value Measurements
Rights entity acquired as a percentage of specified percentage	6.70%	6.70%
Fair value of warrants			$ 700