Investment in tenancy-in-common ('TIC') (Schedule of Income Statement of Pierre Property) (Details) - USD ($) $ in Thousands	3 Months Ended									8 Months Ended	12 Months Ended
	Oct. 31, 2020	Jul. 31, 2020		Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2020	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Schedule of Equity Method Investments [Line Items]
Revenue	$ 11,297	$ 12,149	[1]	$ 13,688	$ 15,593	$ 15,308	$ 15,255	$ 14,786	$ 14,928		$ 52,727	$ 60,277	$ 57,997
Operating expenses											48,967	41,450	38,703
Net operating income											3,760	18,827	19,294
Depreciation											10,341	11,339	11,515
Interest expense including amortization of deferred financing costs											14,122	18,070	18,667
Net income	$ (7,475)	$ (320)		$ 27,136	$ (2,021)	$ 263	$ 265	$ 830	$ 435		17,320	1,793	966
FREIT's loss on investment in TIC (65% interest)											$ (202)
Pierre Property [Member]
Schedule of Equity Method Investments [Line Items]
Revenue										$ 4,981
Operating expenses										2,786
Net operating income										2,195
Depreciation										1,435
Interest expense including amortization of deferred financing costs										1,070
Net income										(310)
FREIT's loss on investment in TIC (65% interest)										$ (202)

[1] 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)