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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
6 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Jul. 22, 2019
May 31, 2019
Summary of Significant Accounting Policies [Line Items]        
Repossessed Assets $ 0     $ 0
Restricted Cash and Cash Equivalents 10,638,000     8,282,000
Land Available-for-sale     $ 14,000,000  
Gain (Loss) on Sale of Properties 7,713,000 $ 0    
Proceeds from sale of land 22,000,000      
Deferred income 53,947,000     57,989,000
Deferred Loan Conversion Fees $ 48,000,000     $ 52,000,000