Annual report pursuant to Section 13 and 15(d)

Liability Measured at Fair Value on Recurring Basis by Level within Fair Value Hierarchy (Detail)

v3.19.2
Liability Measured at Fair Value on Recurring Basis by Level within Fair Value Hierarchy (Detail) - USD ($)
May 31, 2019
May 31, 2018
Liability:    
Total liability [1] $ 2,407,269 $ 1,323,732
warrants    
Liability:    
Derivative liability [1] 2,005,137  
convertible note redemption provision    
Liability:    
Derivative liability [1] 402,132 1,323,732
Level 3    
Liability:    
Total liability [1] 2,407,269 1,323,732
Level 3 | warrants    
Liability:    
Derivative liability [1] 2,005,137  
Level 3 | convertible note redemption provision    
Liability:    
Derivative liability [1] $ 402,132 $ 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 May 31, 2019 and May 31, 2018.