Maryland property dispositions (Details) - USD ($)			1 Months Ended		3 Months Ended
	Jan. 10, 2022	Jan. 07, 2022	Dec. 30, 2021	Nov. 22, 2021	Jan. 31, 2022	Jan. 31, 2021	Oct. 31, 2021
Escrow deposit amount					$ 1,082,000	$ 1,923,000
Repayment of secured loans receivable					171,002,000	$ 969,000
FREIT Maryland [Member]
Fixed rate mortgage loans			$ 14,400,000
Repayment of secured loans receivable					5,100,000
Annual debt service savings			1,173,000
Mortgages [Member] | FREIT Maryland [Member]
Debt Instrument, collateral amount classified as construction in progress			27,700,000
Net proceeds from refinancing of debt			35,400,000
Grande Rotunda, LLC [Member]
Principal amount on notes paid off			$ 31,000,000				$ 700,000
Purchase and Sale Agreement [Member] | FREIT Maryland owned 100% of its subsidiary [Member]
Percentage of ownership interest				100.00%
Purchase and Sale Agreement [Member] | Grande Rotunda [Member]
Percentage of ownership interest				60.00%
Purchase and Sale Agreement [Member] | Damascus Centre [Member]
Percentage of ownership interest				70.00%
Purchase and Sale Agreement [Member] | FREIT Maryland [Member]
Percentage of ownership interest			60.00%
Purchase and Sale Agreement [Member] | Rotunda 100 [Member]
Percentage of ownership interest			40.00%
Purchase and Sale Agreement of Rotunda Property [Member]
Purchase price			$ 191,080,598	$ 2,723,000
Escrow deposit amount			14,026,401	15,526,731
Debt Instrument, collateral amount			135,700,000
Repayments of mortgage debt			116,500,000
Proceeds from anticipated to be released from held in escrow					8,200,000
Expense incurred			4,800,000
Gain from sale					51,200,000
Straight-line rent receivable					1,800,000
Increase in expense for reserve of uncollectible rents with consolidated impact					1,100,000
Purchase and Sale Agreement of Rotunda Property [Member] | Minimum [Member]
Purchase price				248,750,269
Purchase and Sale Agreement of Rotunda Property [Member] | Maximum [Member]
Purchase price				$ 267,000,000
Grande Rotunda [Member]
Fixed rate mortgage loans			$ 21,400,000
Membership interest percentage			60.00%
Purchase and Sale Agreement of Westridge Square Property [Member]
Purchase price		$ 20,984,604
Debt Instrument, collateral amount		11,500,000
Repayments of mortgage debt		21,100,000
Expense incurred		500,000
Gain from sale		8,700,000
Straight-line rent receivable		500,000
Increase in expense for reserve of uncollectible rents with consolidated impact		300,000
Paid net cash outlays from sale		$ 700,000
Purchase and Sale Agreement of Damascus Property [Member]
Purchase price	$ 36,685,067
Escrow deposit amount	484,934
Debt Instrument, collateral amount	24,600,000
Repayments of mortgage debt	18,200,000
Proceeds from anticipated to be released from held in escrow	400,000
Swap breakage fees	213,000
Expense incurred	900,000
Net proceeds from refinancing of debt	16,900,000
Fixed rate mortgage loans	$ 11,800,000
Membership interest percentage	70.00%
Gain from sale	$ 10,100,000
Straight-line rent receivable					600,000
Increase in expense for reserve of uncollectible rents with consolidated impact					300,000
Purchase and Sale Agreement of Maryland Properties [Member]
Debt Instrument, collateral amount	171,800,000
Repayments of mortgage debt	155,800,000
Proceeds from anticipated to be released from held in escrow	9,300,000
Swap breakage fees	213,000
Expense incurred	6,200,000
Net proceeds from refinancing of debt	51,600,000
Gain from sale	7,000,000
Straight-line rent receivable					2,900,000
Increase in expense for reserve of uncollectible rents with consolidated impact					$ 1,700,000
Purchase and Sale Agreement of Maryland Properties [Member] | Grande Rotunda [Member]
Net proceeds from refinancing of debt	31,000,000
Gain from sale	$ 46,300,000