Schedule of Estimated Useful Lives of Intangible Assets (Detail)	9 Months Ended
Sep. 30, 2017
Developed Technology
Finite Lived Intangible Assets [Line Items]
Intangible assets, Useful Lives	10 years
Tradename
Finite Lived Intangible Assets [Line Items]
Intangible assets, Useful Lives	10 years

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_FiniteLivedIntangibleAssetsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration