Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Income Tax (Details)

v3.21.4
Summary of Significant Accounting Policies - Income Tax (Details) - USD ($)
6 Months Ended 12 Months Ended
Nov. 30, 2021
Nov. 30, 2020
May 31, 2021
May 31, 2019
Accounting Policies [Abstract]        
Income tax expense $ 0 $ 0   $ (2,827,000)
Effective tax rate 0.00%   0.00%  
Federal statutory income tax rate, percent 21.00%   21.00%