Quarterly report pursuant to Section 13 or 15(d)

Accounts Payable and Accrued Liabilities (Details)

v3.21.1
Accounts Payable and Accrued Liabilities (Details)
$ in Millions
9 Months Ended 12 Months Ended
Feb. 28, 2021
USD ($)
item
May 31, 2020
USD ($)
item
Concentration Risk [Line Items]    
Accounts payable and accrued liabilities, combined | $ $ 86.1 $ 36.4
Number of vendors | item 2 2
Accounts Payable And Accrued Liabilities Current Excluding Interest Etc. [Member] | Credit Availability Concentration Risk [Member] | Vendor One [Member]    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 79.00% 49.00%
Accounts Payable And Accrued Liabilities Current Excluding Interest Etc. [Member] | Credit Availability Concentration Risk [Member] | Vendor Two [Member]    
Concentration Risk [Line Items]    
Concentration Risk, Percentage 10.00% 20.00%