Interest rate cap and swap contracts (Details) - USD ($)	3 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Oct. 31, 2022
Interest rate cap and swap contracts (Details) [Line Items]
Underlying loan, description	On December 30, 2021, the property owned by Grande Rotunda was sold, a portion of the proceeds from the sale was used to pay off the $116.5 million then outstanding balance of the underlying loan and the corresponding interest rate cap on this loan matured with no settlement due at maturity. On January 10, 2022, the property owned by Damascus Centre was sold and a portion of the proceeds from the sale was used to pay off the $18.2 million then outstanding balance of the underlying loan and the corresponding swap breakage fees of approximately $213,000 related to the early termination of the interest rate swap contracts on this loan which was included as interest expense on the accompanying condensed consolidated statement of income for the three months ended January 31, 2022. (See Note 7 for further details on the sales of these properties.) On June 17, 2022, Wayne PSC terminated its interest rate swap contract on its underlying loan held with People’s United Bank, which had a maturity date of October 2026, for a settlement amount of approximately $1.4 million.
Unrealized gain (loss) amount	$ 450,000	$ 1,262,000
Regency Swap [Member]
Interest rate cap and swap contracts (Details) [Line Items]
Unrealized gain (loss) amount	482,000
Interest rate swap contract liabilities			$ 611,000
Station Place Swap [Member]
Interest rate cap and swap contracts (Details) [Line Items]
Unrealized gain (loss) amount	$ 477,000
Interest rate swap contract liabilities			$ 798,000