Selected quarterly financial data (unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended												9 Months Ended	12 Months Ended
	Jun. 30, 2020	Feb. 28, 2020	Oct. 31, 2021		Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2020		Jul. 31, 2020		Apr. 30, 2020		Jan. 31, 2020	Jul. 31, 2021	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Revenue			$ 12,191	[1]	$ 12,542	$ 12,804	$ 12,754	$ 11,297		$ 12,149	[2]	$ 13,688		$ 15,593		$ 50,291	$ 52,727	$ 60,277
Expenses, net			12,176		12,226	12,867	11,975	18,772	[3]	12,469	[2]	(13,448)	[4]	17,614		49,244	35,407
Net income (loss)			15		316	(63)	779	(7,475)		(320)		27,136		(2,021)		1,047	17,320	1,793
Net (income) loss attributable to noncontrolling interests in subsidiaries			136		(107)	72	(221)	3,251		139		84		(241)		(120)	3,233	(6)
Net income (loss) income attributable to common equity			$ 151		$ 209	$ 9	$ 558	$ (4,224)		$ (181)		$ 27,220		$ (2,262)		$ 927	$ 20,553	$ 1,787
(Loss) Earnings per share - basic and diluted			$ 0.02		$ 0.03		$ 0.08	$ (0.60)	[3]	$ (0.02)	[2]	$ 3.88	[4]	$ (0.32)		$ 0.13	$ 2.94	$ 0.26
Dividends declared per share			$ 0.10		$ 0.05	$ 0.05	$ 0.05									$ 0.25		$ 0.60
Gain on sale of property per share		$ 3.96															$ 0.62
Gain from sales		$ 27,700
Settle-ups of Common Area Maintenance with commercial tenants			$ 700												$ 300		$ 400
Straight-line rent receivable	$ 400							$ 400									400
Increase in expense for reserve of uncollectible rents																	300
Increase in expense for reserve of uncollectible rents with consolidated impact																	200
Unamortized leasing commissions fully expensed in a net impact of net income																	900
Tenant improvements related to Cobb Theatre with net book value																	7,300
FREIT [Member]
Unamortized leasing commissions fully expensed in a net impact of net income																	500
Tenant improvements related to Cobb Theatre with net book value																	$ 4,400
Cobb theater Rotunda retail property [Mmeber]
Gain on sale of property per share	$ 0.07

[1] Includes settle-ups of Common Area Maintenance with commercial tenants of approximately $0.7 million for the fiscal quarter ended October 31, 2021, of which approximately $0.4 million related to Fiscal 2020 and approximately $0.3 million related to prior quarters in Fiscal 2021.

[2] Includes impact of the rejection of the lease for Cobb Theatre at the Rotunda retail property as of June 30, 2020 resulting in the reversal against revenue of uncollected rents in the amount of approximately $0.3 million and a straight-line rent receivable of approximately $0.4 million and the write-off of unamortized leasing commissions in the amount of approximately $0.2 million resulting in a net impact of approximately $0.9 million (with a consolidated impact to FREIT of approximately $0.5 million). ($0.07 per share)

[3] Includes write-off of Cobb Theatre's tenant improvements of approximately $7.3 million (with a consolidated impact to FREIT of approximately $4.4 million) at the Rotunda retail property due to COVID-19. ($0.62 per share)

[4] Includes $27.7 million gain on deconsolidation of subsidiary related to the Pierre Towers property which was deconsolidated from FREIT's operating results due to the conversion to a tenancy-in-common form of ownership on February 28, 2020. ($3.96 per share)