Interest rate cap and swap contracts (Details) - USD ($)	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Derivative [Line Items]
Unrealized gain (loss) on derivatives			$ (160,000)
Net unrealized (loss) gain on interest rate swap contracts	2,616,000	(2,798,000)	$ (6,400,000)
Interest rate swap contract liabilities	2,308,000	4,924,000
Damascus Centre Swap [Member]
Derivative [Line Items]
Interest rate swap contract liabilities	278,000	610,000
Wayne PSC swap [Member]
Derivative [Line Items]
Interest rate swap contract liabilities	348,000	1,260,000
Regency Swap [Member]
Derivative [Line Items]
Interest rate swap contract liabilities	750,000	1,385,000
Station Place swap [Member]
Derivative [Line Items]
Interest rate swap contract liabilities	932,000	1,669,000
Grande Rotunda interest rate cap [Member]
Derivative [Line Items]
Interest rate swap contract liabilities	$ 0	$ 0