Quarterly report pursuant to Section 13 or 15(d)

Derivative Liability - Additional Information (Detail)

v3.8.0.1
Derivative Liability - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Nov. 30, 2017
Nov. 30, 2016
Nov. 30, 2017
Nov. 30, 2016
Derivative [Line Items]        
Change in fair value of derivative liability $ 829,600 $ 1,223,466 $ 466,934 $ 1,223,466