Commitments and Contingencies - Additional Information (Detail) $ in Millions	1 Months Ended
Feb. 29, 2016 USD ($)
Roquette Arbitration \| Pending Litigation
Commitment And Contingencies [Line Items]
Legal Fees	$ 2.3

Amount of judgment or settlement awarded to (against) the entity in respect of litigation.

No definition available.

Name:	us-gaap_LitigationSettlementAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration