Annual report pursuant to Section 13 and 15(d)

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

v3.19.2
Liability Measured at Fair Value on Recurring Basis by Level within Fair Value Hierarchy (Parenthetical) (Detail) - USD ($)
May 31, 2019
May 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities fair value [1] $ 2,407,269 $ 1,323,732
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets fair value 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities fair value $ 0 $ 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 May 31, 2019 and May 31, 2018.