Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Liabilities Measured At Fair Value on Recurring Basis by Level within Fair Value Hierarchy (Detail) - USD ($)
Feb. 28, 2019
May 31, 2018
Liability:    
Derivative liability $ 2,826,919  
Total liability [1] 3,192,243 $ 1,323,732
Warrant [Member]    
Liability:    
Derivative liability [1] 793,866 1,323,732
Convertible Note Redemption Provision    
Liability:    
Derivative liability [1] 2,398,377 0
Level 3    
Liability:    
Total liability [1] 3,192,243 1,323,732
Level 3 | Warrant [Member]    
Liability:    
Derivative liability [1] 793,866 1,323,732
Level 3 | Convertible Note Redemption Provision    
Liability:    
Derivative liability [1] $ 2,398,377 $ 0
[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 February 28, 2019 and May 31, 2018.