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 9 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Feb. 28, 2018
Feb. 28, 2017
Derivative [Line Items]        
Change in fair value of derivative liability $ (741,066) $ (26,666) $ (274,132) $ 1,196,800