Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments (Details)

v3.19.2
Fair Value of Financial Instruments (Details) - Significant Other Observable Inputs (Level 2) [Member]
May 31, 2019
$ / shares
Feb. 28, 2019
$ / shares
Warrant [Member] | November 2018 Canopy Warrants [Member] | Issue date exercise price [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, C$ per share $ 50.40 $ 50.40
Warrant [Member] | November 2018 Canopy Warrants [Member] | Valuation date stock price [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, C$ per share $ 54.48 $ 62.38
Warrant [Member] | November 2018 Canopy Warrants [Member] | Expected life (in years) [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, term 2 years 4 months 24 days 2 years 8 months 12 days
Warrant [Member] | November 2018 Canopy Warrants [Member] | Expected volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, decimal 0.727 0.793
Warrant [Member] | November 2018 Canopy Warrants [Member] | Risk-free interest rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, decimal 0.014 0.018
Warrant [Member] | November 2018 Canopy Warrants [Member] | Expected dividend yield [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, decimal 0.000 0.000
Warrant [Member] | November 2017 Canopy Warrants [Member] | Issue date exercise price [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, C$ per share $ 12.98 $ 12.98
Warrant [Member] | November 2017 Canopy Warrants [Member] | Valuation date stock price [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, C$ per share $ 54.48 $ 62.38
Warrant [Member] | November 2017 Canopy Warrants [Member] | Expected life (in years) [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, term 10 months 24 days 1 year 2 months 12 days
Warrant [Member] | November 2017 Canopy Warrants [Member] | Expected volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, decimal 0.762 0.878
Warrant [Member] | November 2017 Canopy Warrants [Member] | Risk-free interest rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, decimal 0.016 0.018
Warrant [Member] | November 2017 Canopy Warrants [Member] | Expected dividend yield [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Warrants outstanding, measurement input, decimal 0.000 0.000
Convertible debt securities [Member] | Valuation date stock price [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt instrument, measurement input, C$ per share $ 54.48 $ 62.38
Convertible debt securities [Member] | Expected life (in years) [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt securities, term 4 years 1 month 6 days 4 years 4 months 24 days
Convertible debt securities [Member] | Expected volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Instrument, measurement input, decimal 0.476 0.459
Convertible debt securities [Member] | Risk-free interest rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Instrument, measurement input, decimal 0.014 0.018
Convertible debt securities [Member] | Expected dividend yield [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt Instrument, measurement input, decimal 0.000 0.000
Convertible debt securities [Member] | Conversion price [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Debt instrument, measurement input, C$ per share $ 48.17 $ 48.17