Commitments and Contingencies - Additional Information (Detail) $ in Millions	Jun. 30, 2018 USD ($)
Maximum
Commitments and Contingencies Disclosure [Line Items]
Payment required under certain channel distribution agreement upon revenue target achieved	$ 0.5

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

No definition available.

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant