Commitments and Contingencies - Legal Proceedings and Other Contingencies (Details)				1 Months Ended						6 Months Ended	11 Months Ended	36 Months Ended
	Jun. 29, 2016 lawsuit	Nov. 22, 2010	Oct. 18, 2010 patent	Jul. 31, 2016 patent	Apr. 30, 2016 litigation_case claim_under_petition	Mar. 31, 2016 claim_under_petition	Apr. 30, 2015 litigation_case	Jan. 31, 2015 patent	Apr. 30, 2014	Jun. 30, 2016 product	Jan. 27, 2016 lawsuit patent	Dec. 31, 2012 patent
Radiopharmaceutical Products [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of radiopharmaceutical products | product										2
Celator Acquisition [Member] | Celator Pharmaceuticals, Inc. [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of claims filed during the period | lawsuit	2
Pending Litigation [Member] | Xyrem [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of patents named in review petitions								6
Number of petition claims accepted | claim_under_petition					16	3
Number of petition claims PTAB denied | claim_under_petition					18	25
Pending Litigation [Member] | Xyrem ANDA Matters [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of patents allegedly infringed upon			5								5	10
Court ordered stay period		30 months							30 months
Number of litigation cases after consolidation | litigation_case							1
Number of claims filed | lawsuit											3
Number of patent litigation cases consolidated | litigation_case					2
Subsequent Event [Member] | Pending Litigation [Member] | Xyrem [Member]
Commitments and Contingencies Disclosure [Line Items]
Number of patents deemed unenforceable by PTAB				6