Subsequent Events	12 Months Ended
	Dec. 31, 2021
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsOn January 31, 2022, the Company entered into a global settlement agreement with Novartis, AAA, Endocyte and their affiliates to settle certain disputes between the parties. Under the Novartis Agreement, Novartis will make a lump sum payment and reimburse the Company for certain fees and expenses in connection with the German Litigation. See Note 20, “Commitments and Contingencies”, for further details.