Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Summary of Fair Value of Convertible Note Redemption Provision Derivative Liability (Detail) - USD ($)
9 Months Ended
Feb. 28, 2019
Feb. 28, 2018
Net Proceeds $ 15,460,000 $ 4,888,500
Convertible Note Redemption Provision Derivative Liability [Member]    
Derivative Liability 2,398,377  
Convertible Note Redemption Provision Derivative Liability [Member] | Inception date June 2018 Note, November 15, 2018 [Member]    
Net Proceeds 5,000,000  
Inception Date 1,284,988  
Derivative Liability 1,065,646  
Convertible Note Redemption Provision Derivative Liability [Member] | Inception date January 2019 Note, January 30, 2019 [Member]    
Net Proceeds 5,000,000  
Inception Date 1,465,008  
Derivative Liability $ 1,332,731