Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS??? EQUITY (Details) - Fair Value Measurement Inputs and Valuation Techniques

v3.20.2
STOCKHOLDERS’ EQUITY (Details) - Fair Value Measurement Inputs and Valuation Techniques
May 31, 2020
May 31, 2019
Measurement Input, Expected Dividend Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement Input   0
Measurement Input, Expected Term [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement Input   3
Minimum [Member] | Measurement Input, Price Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement Input 0 79.02
Minimum [Member] | Measurement Input, Expected Dividend Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement Input 0  
Minimum [Member] | Measurement Input, Risk Free Interest Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement Input 0 0.0268
Minimum [Member] | Measurement Input, Expected Term [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement Input 0  
Maximum [Member] | Measurement Input, Price Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement Input   4.003
Maximum [Member] | Measurement Input, Risk Free Interest Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Measurement Input   0.0277