Investment in tenancy-in-common (Schedule of Income Statement of Pierre Property) (Details) - USD ($) $ in Thousands	3 Months Ended										8 Months Ended	12 Months Ended
	Oct. 31, 2021		Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020		Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Schedule of Equity Method Investments [Line Items]
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
Operating expenses												36,789	48,967	41,450
Depreciation												9,300	10,341	11,339
Operating income												13,502	3,760	18,827
Interest expense including amortization of deferred financing costs												12,276	14,122	18,070
Net income (loss)	$ 15		$ 316	$ (63)	$ 779	$ (7,475)	$ (320)		$ 27,136	$ (2,021)		1,047	17,320	1,793
FREIT's loss on investment in TIC (65% interest)												(295)	$ (202)
Pierre Property [Member]
Schedule of Equity Method Investments [Line Items]
Revenue											$ 4,981	7,627
Operating expenses											2,786	4,311
Depreciation											1,435	2,166
Operating income											760	1,150
Interest expense including amortization of deferred financing costs											1,070	1,604
Net income (loss)											(310)	(454)
FREIT's loss on investment in TIC (65% interest)											$ (202)	$ (295)

[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)