Business Overview - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2016 USD ($) Item
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of commercial products | Item	10
Number of radiopharmacies owned | Item	3
Senior Secured Term Loan Facility [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Debt instrument, face amount	$ 365,000,000
Revolving Line of Credit [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Maximum borrowing capacity	50,000,000
Borrowing base	43,300,000
Unfunded standby letter of credit outstanding	8,800,000
Accrued interest	100,000
Available borrowing capacity	$ 34,400,000