Commitments and Contingencies - Additional Information (Detail) - Subsequent Event - Complaint - Settled Litigation	Oct. 05, 2015 USD ($)
Commitment And Contingencies [Line Items]
Litigation settlement amount	$ 125,000
Sycamore Networks Incorporation
Commitment And Contingencies [Line Items]
Litigation settlement amount	$ 50,000

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