Annual report pursuant to Section 13 and 15(d)

Derivative Liability - Additional Information (Detail)

v3.7.0.1
Derivative Liability - Additional Information (Detail) - USD ($)
12 Months Ended
May 31, 2017
May 31, 2016
Derivative [Line Items]    
Change in fair value of derivative liability $ 2,164,533 $ 646,505
Warrants and Non-cash Interest Expense    
Derivative [Line Items]    
Changes in the fair value of the liability $ 540,000