Quarterly report pursuant to Section 13 or 15(d)

Summary of Fair Value of Convertible Note Redemption Provision Derivative Liability (Detail)

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Summary of Fair Value of Convertible Note Redemption Provision Derivative Liability (Detail) - USD ($)
6 Months Ended
Nov. 15, 2018
Nov. 30, 2018
Nov. 30, 2017
Derivative [Line Items]      
Net Proceeds   $ 5,000,000 $ 4,888,500
Derivative Liability $ 1,280,000 1,280,000  
Convertible Note Redemption Provision Derivative Liability [Member]      
Derivative [Line Items]      
Net Proceeds 5,000,000 5,000,000  
Derivative Liability $ 1,284,998 $ 1,286,076