Investment in tenancy-in-common (Schedule of Income Statement of Pierre Property) (Details) - USD ($) $ in Thousands	3 Months Ended						5 Months Ended	9 Months Ended
	Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Schedule of Equity Method Investments [Line Items]
Revenue	$ 12,542			$ 12,149				$ 38,100	$ 41,430
Operating expenses	9,105			9,308				27,669	33,361
Depreciation	2,315			2,425				6,948	7,887
Operating income	3,437			2,841				10,431	8,069
Interest expense including amortization of deferred financing costs	3,050			3,121				9,242	11,032
Net income (loss)	316	$ (63)	$ 779	(320)	$ 27,136	$ (2,021)		1,032	24,795
FREIT's loss on investment in TIC (65% interest)	(100)			(78)				(245)	$ (96)
Pierre Property [Member]
Schedule of Equity Method Investments [Line Items]
Revenue	1,900			1,864			$ 3,106	5,674
Operating expenses	1,111			1,046			1,689	3,225
Depreciation	542			537			895	1,623
Operating income	247			281			522	826
Interest expense including amortization of deferred financing costs	401			401			669	1,203
Net income (loss)	(154)			(120)			(147)	(377)
FREIT's loss on investment in TIC (65% interest)	$ (100)			$ (78)			$ (96)	$ (245)