Sale of Puerto Rico Subsidiary - Assets and Liabilities Held for Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022	Jan. 29, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 0	$ 0		$ 941
Puerto Rican Radiopharmacy Servicing Subsidiary
Non-Current Liabilities:
Pre-tax book gain on disposal	$ 15,300
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Puerto Rican Radiopharmacy Servicing Subsidiary
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price for stock			$ 18,000
Disposal group holdback amount			1,800
Current assets
Cash and cash equivalents			540
Accounts receivable, net			1,959
Inventory			530
Other current assets			65
Total current assets			3,094
Non-Current Assets:
Property, plant and equipment, net			780
Intangibles, net			96
Other long-term assets			774
Total assets held for sale			4,744
Current liabilities
Accounts payable			185
Accrued expenses and other liabilities			369
Total current liabilities			554
Non-Current Liabilities:
Asset retirement obligations			306
Other long-term liabilities			588
Total liabilities held for sale			$ 1,448