Quarterly report pursuant to Section 13 or 15(d)

Liabilities Measured At Fair Value on Recurring Basis by Level within Fair Value Hierarchy (Detail)

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Liabilities Measured At Fair Value on Recurring Basis by Level within Fair Value Hierarchy (Detail) - USD ($)
Nov. 30, 2018
May 31, 2018
Liabilities:    
Derivative liability $ 2,826,919  
Total liabilities [1] 3,075,142 $ 1,323,732
Convertible Note Redemption Provision    
Liabilities:    
Derivative liability [1] 1,286,076  
Warrants    
Liabilities:    
Derivative liability [1] 1,789,066 1,323,732
Level 3    
Liabilities:    
Total liabilities [1] 3,075,142 1,323,732
Level 3 | Convertible Note Redemption Provision    
Liabilities:    
Derivative liability [1] 1,286,076  
Level 3 | Warrants    
Liabilities:    
Derivative liability [1] $ 1,789,066 $ 1,323,732
[1] The Company did not have any assets or liabilities measured at fair value using Level 1 or 2 of the fair value hierarchy as of November 30, 2018 and May 31, 2018.