Summary of Fair Value Derivative Liability and Linked Common Shares (Detail) - USD ($)	May 31, 2015	Feb. 06, 2015	Sep. 26, 2014
Derivative [Line Items]
Total derivative liability	$ 2,008,907	$ 403,266	$ 767,038
Shares indexed to derivative liability	5,185,185	1,500,000	2,000,000