| Legal Proceedings, Commitments and Contingencies - Additional Information (Details) $ in Millions | Mar. 31, 2017  USD ($) | 
|---|---|
| Commitments And Contingencies Disclosure [Abstract] | |
| Estimate of milestone payments | $ 15.5 | 
| X | ||||||||||
| 
- References No definition available. 
 | 
| X | ||||||||||
| 
- Definition Reflects estimated obligations that are due and payable upon achievement of certain criteria categorized as developmental, regulatory, or commercial milestones. No definition available. 
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