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Investment in tenancy-in-common (Details) - USD ($)
8 Months Ended 12 Months Ended
Feb. 28, 2020
Oct. 31, 2020
Oct. 31, 2022
Oct. 31, 2021
Oct. 31, 2020
Investment in tenancy-in-common (Details) [Line Items]          
Gain on deconsolidation of subsidiary     $ 27,700,000    
Investment in tenancy-in-common     18,798,000 $ 19,383,000  
Percentage of management fees of rent collected 5.00%        
Management fees   $ 241,000 402,000 375,000  
Commission paid     40,000 51,000  
Insurance commissions   26,000 164,000 209,000 $ 190,000
F R E I Ts Investment [Member]          
Investment in tenancy-in-common (Details) [Line Items]          
Investment in tenancy-in-common   $ 20,100,000     20,100,000
Loss on investment     228,000 295,000 $ 202,000
S And A Commercial Associates Limited Partnership [Member]          
Investment in tenancy-in-common (Details) [Line Items]          
Percentage of ownership interest 65.00%        
Pierre Towers [Member]          
Investment in tenancy-in-common (Details) [Line Items]          
Percentage of ownership interest 100.00%        
Pierre Towers, LLC [Member]          
Investment in tenancy-in-common (Details) [Line Items]          
Percentage of ownership interest 100.00%        
F R E I Ts Investment [Member]          
Investment in tenancy-in-common (Details) [Line Items]          
Percentage of ownership interest 100.00%        
TIC Agreement [Member]          
Investment in tenancy-in-common (Details) [Line Items]          
Percentage of ownership interest 65.00%        
Hekemian & Co. [Member]          
Investment in tenancy-in-common (Details) [Line Items]          
Management fees     35,100 32,500  
F R E I Ts Investment [Member]          
Investment in tenancy-in-common (Details) [Line Items]          
Investment in tenancy-in-common     $ 18,800,000 $ 19,400,000