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Management agreement, fees and transactions with related party (Details) - USD ($)
3 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Oct. 31, 2020
Related Party Transaction [Line Items]      
Asset management fees $ 526,000 $ 715,000  
Insurance commissions 10,000    
Secured loans receivable 5,219,000   $ 5,194,000
Rotunda 100 members [Member]      
Related Party Transaction [Line Items]      
Secured loans receivable 4,000,000   4,000,000
Unpaid accrued interest $ 1,219,000   1,194,000
Grande Rotunda, LLC [Member]      
Related Party Transaction [Line Items]      
Ownership by noncontrolling owners (percentage) 40.00%    
Ownership by parent (percentage) 60.00%    
Due to affiliate $ 6,000,000   $ 5,900,000
Managing Agent Hekemian & Co [Member]      
Related Party Transaction [Line Items]      
Asset management fees 513,000 699,000  
Leasing commissions and reimbursement of operating expenses 129,000 475,000  
Insurance commissions 69,000 51,000  
Robert S. Hekemian [Member]      
Related Party Transaction [Line Items]      
Trustee fees and related interest payable in stock units 0 21,000  
Consulting fee per month 5,000    
Consulting fee quarterly installments 15,000    
Consulting services expense 0 8,000  
Robert S. Hekemian, Jr. [Member]      
Related Party Transaction [Line Items]      
Trustee fees and related interest payable in stock units 116,000 119,000  
Allan Tubin [Member]      
Related Party Transaction [Line Items]      
Trustee fees and related interest payable in stock units 8,000 8,000  
David Hekemian [Member]      
Related Party Transaction [Line Items]      
Trustee fees and related interest payable in stock units $ 14,000 $ 16,000  
Minimum [Member]      
Related Party Transaction [Line Items]      
Asset management fees percentage rate 4.00%    
Maximum [Member]      
Related Party Transaction [Line Items]      
Asset management fees percentage rate 5.00%