Significant Inputs and Assumptions Used in Binomial Lattice Model for Derivative Liability (Parenthetical) (Detail)	Apr. 30, 2015 $ / shares
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Adjusted conversion price	$ 0.675
Weighted average sold price of common stock	$ 0.75

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