Discontinued Operations - Additional Information (Details) $ in Thousands		1 Months Ended
	Jul. 03, 2020 USD ($)	Mar. 31, 2019 USD ($) product	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Error correction amount			$ 6,568	$ 7,842	$ 20,523
Commercial Product Portfolio | Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of products | product		7
Upfront payment expected to be received		$ 158,800
Aggregate amount receivable based on achievement of milestones		140,000
Payments receivable based on achievement of regulatory milestones		40,000
Potential payments based on achievement of sales milestones		$ 100,000
Pricing Of ZEVALIN To Qualifying Public Health Services
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reduction to government chargebacks liability	$ 10,800
Pricing Of ZEVALIN To Qualifying Public Health Services | Revision of Prior Period, Error Correction, Adjustment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Error correction amount						$ 12,000