Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Revenue (Details)

v3.22.1
Summary of Significant Accounting Policies - Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Feb. 28, 2022
Feb. 28, 2021
Feb. 28, 2022
Feb. 28, 2021
Accounting Policies [Abstract]        
Contract with Customer, Asset, after Allowance for Credit Loss $ 0 $ 0 $ 0 $ 0
Contract with Customer, Liability 0   0  
Revenue from Contract with Customer, Excluding Assessed Tax     266 0
Contract with Customer, Liability, Revenue Recognized $ 0 $ 0 $ 0 $ 0