Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Revenue (Details)

v3.21.2
Summary of Significant Accounting Policies - Revenue (Details) - USD ($)
3 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Accounting Policies [Abstract]    
Contract with Customer, Asset, after Allowance for Credit Loss $ 0 $ 0
Contract with Customer, Liability 0 0
Revenue from Contract with Customer, Excluding Assessed Tax 41,000 0
Contract with Customer, Liability, Revenue Recognized 0 0
Contract with Customer, Performance Obligation Satisfied in Previous Period $ 0 $ 0