Acquisitions - Change in Fair Value of Contingent Consideration Liability, Docetaxel (Details) - Contingent Consideration Liability - Non-Alcohol Docetaxel Injection - Docetaxel product rights $ in Thousands	15 Months Ended
	Mar. 31, 2017 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance January 12, 2016	$ 6,370
Changes in fair value	1,082
Payment of contingent consideration	(286)
Closing Balance March 31, 2017	$ 7,166