Revenue - Cost to obtain and fulfill a contract (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
May 31, 2021
Nov. 30, 2020
May 31, 2020
Nov. 30, 2019
Nov. 30, 2020
Nov. 30, 2019
Capitalized Contract Cost [Line Items]            
Deferred amortization term 5 years          
Impairment loss on deferred commission   $ 0   $ 0 $ 0 $ 0
Selling and Marketing Expense [Member]            
Capitalized Contract Cost [Line Items]            
Amortization of contract cost $ 438   $ 233      
Sales commission            
Capitalized Contract Cost [Line Items]            
Amortization of contract cost $ 427   503      
Customer set up cost            
Capitalized Contract Cost [Line Items]            
Deferred amortization term 5 years          
Amortization of contract cost $ 164   160      
Deferred Implementation Costs [Member]            
Capitalized Contract Cost [Line Items]            
Amortization of contract cost $ 81   $ 144