Investment in tenancy-in-common (Schedule of balance sheet of Pierre Property) (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Oct. 31, 2021	Jan. 31, 2021	Oct. 31, 2020
Schedule of Equity Method Investments [Line Items]
Real estate, net	$ 96,999	$ 270,634
Cash and cash equivalents	95,438	35,891	$ 39,788
Tenants' security accounts	1,062	1,340
Receivables and other assets	754	1,622
Total Assets	227,466	346,105
Mortgages payable, net of unamortized debt issuance costs	136,491	299,876
Accounts payable and accrued expenses	2,804	2,375
Tenants' security deposits	1,305	2,039
Deferred revenue	559	1,143
Equity	82,029	31,951	$ 31,920	$ 30,863
Total Liabilities and Equity	227,466	346,105
FREIT Maryland's investment in TIC (65% interest)	18,902	19,383
Pierre Property [Member]
Schedule of Equity Method Investments [Line Items]
Real estate, net	77,508	78,023
Cash and cash equivalents	1,205	1,338
Tenants' security accounts	475	484
Receivables and other assets	359	510
Total Assets	79,547	80,355
Mortgages payable, net of unamortized debt issuance costs	49,624	49,691
Accounts payable and accrued expenses	275	261
Tenants' security deposits	475	484
Deferred revenue	93	99
Equity	29,080	29,820
Total Liabilities and Equity	79,547	80,355
FREIT Maryland's investment in TIC (65% interest)	$ 18,902	$ 19,383