Interest rate cap and swap contracts (Details) - USD ($)		12 Months Ended
	Dec. 30, 2021	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Interest rate cap and swap contracts (Details) [Line Items]
Underlying loan, description	On December 30, 2021, the Rotunda 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 consolidated statement of income for the year ended October 31, 2022. (See Note 2 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		$ 3,717,000	$ 2,616,000	$ 2,798,000
Regency Swap [Member]
Interest rate cap and swap contracts (Details) [Line Items]
Interest rate swap contract liabilities		611,000	750,000
Station Place Swap [Member]
Interest rate cap and swap contracts (Details) [Line Items]
Interest rate swap contract liabilities		$ 798,000	932,000
Damascus Centre Swaps [Member]
Interest rate cap and swap contracts (Details) [Line Items]
Interest rate swap contract liabilities			278,000
Wayne PSC Swap [Member]
Interest rate cap and swap contracts (Details) [Line Items]
Interest rate swap contract liabilities			348,000
Grande Rotunda [Member]
Interest rate cap and swap contracts (Details) [Line Items]
Interest rate swap contract liabilities			$ 0