Management agreement, fees and transactions with related party (Details) - USD ($)	3 Months Ended		6 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Management agreement, fees and transactions with related party (Details) [Line Items]
Fees charged to operation	$ 332,000	$ 306,000	$ 659,000	$ 790,000
Commissions and reimbursements	182,000	164,000	322,000	348,000
Commissions, charged to operations	16,000	7,000	65,000	59,000
Fees incurred	21,000	0	21,000	6,294,000
Director fee expense			314,000
Executive compensation				279,000
Rotunda Property [Member]
Management agreement, fees and transactions with related party (Details) [Line Items]
Loan commission			4,777,000
Damascus Property [Member]
Management agreement, fees and transactions with related party (Details) [Line Items]
Loan commission			917,000
Westridge Square Property [Member]
Management agreement, fees and transactions with related party (Details) [Line Items]
Loan commission			525,000
Boulders Property [Member]
Management agreement, fees and transactions with related party (Details) [Line Items]
Loan commission			75,000
Robert S. Hekemian, Jr. [Member]
Management agreement, fees and transactions with related party (Details) [Line Items]
Director fee expense	11,000		21,000
Executive compensation		10,000		20,000
Allan Tubin [Member]
Management agreement, fees and transactions with related party (Details) [Line Items]
Director fee expense	33,000		$ 46,000
Executive compensation		14,000		$ 29,000
FREIT [Member]
Management agreement, fees and transactions with related party (Details) [Line Items]
Director fee expense	$ 173,000
Executive compensation		$ 144,000
Minimum [Member]
Management agreement, fees and transactions with related party (Details) [Line Items]
Management fees equal percentage			4.00%
Maximum [Member]
Management agreement, fees and transactions with related party (Details) [Line Items]
Management fees equal percentage			5.00%