Warrants (Details 1) - shares
3 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Outstanding, Beginning 23,740,290 26,533,624
Issued 0 0
Expired 0 0
Exercised (1,616,667) (2,643,334)
Outstanding, Ending 22,123,623 23,890,290
June 2016 Warrants    
Outstanding, Beginning 277,478 277,478
Issued 0 0
Expired 0 0
Exercised 0 0
Outstanding, Ending 277,478 277,478
October 2017 Warrants    
Outstanding, Beginning 181,818 181,818
Issued 0 0
Expired 0 0
Exercised 0 0
Outstanding, Ending 181,818 181,818
October 2017 Placement Agent Warrants    
Outstanding, Beginning 18,181 18,181
Issued 0 0
Expired 0 0
Exercised 0 0
Outstanding, Ending 18,181 18,181
March 2018 Warrants    
Outstanding, Beginning 441,666 441,666
Issued 0 0
Expired 0 0
Exercised 0 0
Outstanding, Ending 441,666 441,666
March 2018 Placement Agent Warrants    
Outstanding, Beginning 44,166 44,166
Issued 0 0
Expired 0 0
Exercised 0 0
Outstanding, Ending 44,166 44,166
2018 Firm Warrants    
Outstanding, Beginning 20,000,000 20,000,000
Issued 0 0
Expired 0 0
Exercised 0 0
Outstanding, Ending 20,000,000 20,000,000
2018 Pre-Funded Warrants    
Outstanding, Beginning 1,616,667 4,410,001
Issued 0 0
Expired 0 0
Exercised (1,616,667) (2,643,334)
Outstanding, Ending 0 1,766,667
October 2018 Placement Agent Warrants    
Outstanding, Beginning 1,160,314 1,160,314
Issued 0 0
Expired 0 0
Exercised 0 0
Outstanding, Ending 1,160,314 1,160,314