Mortgage financings and line of credit (Details) - USD ($)	1 Months Ended	9 Months Ended
	Jul. 22, 2022	Jul. 31, 2023	Aug. 03, 2023	Feb. 01, 2023	Oct. 31, 2022	Aug. 19, 2022	Dec. 30, 2021
Mortgage Financings and Line of Credit [Line Items]
Loan amount			$ 25,500,000			$ 25,000,000
Installment amount		$ 157,347
Fixed interest rate		7.50%
Principal amount		$ 1,888,166
Loan agreement description	Wayne PSC, LLC (“Wayne PSC”) refinanced its $22.1 million loan (inclusive of deferred interest of approximately $136,000), which would have matured on October 1, 2026, on its Preakness Shopping Center located in Wayne, New Jersey with a new loan held by ConnectOne Bank in the amount of $25,000,000. This loan is interest-only based on a fixed interest rate of 5% and has a term of three years with a maturity date of August 1, 2025. Additionally, an interest reserve escrow was established at closing representing twelve months of interest of $1,250,000, which can be used to pay monthly interest on this loan with a requirement to replenish the escrow account back to $1,250,000 when the balance in the escrow account is reduced to three months of interest. This refinancing resulted in (i) annual debt service savings of approximately $340,000 due to interest-only payments; (ii) an increase in the interest rate from a fixed interest rate of 3.625% to a fixed interest rate of 5%; and (iii) net refinancing proceeds of approximately $1.1 million which can be used for capital expenditures and general corporate purposes. As part of the refinancing, Wayne PSC terminated the interest rate swap contract on the underlying loan resulting in a realized gain on the swap breakage of approximately $1.4 million, which has been recorded as a realized gain on the accompanying condensed consolidated statements of income for the nine and three months ended July 31, 2022. (See Note 4 for additional details.) As of July 31, 2023, the interest reserve escrow account has a balance of approximately $933,000
Escrow amount		933,000
Available to draw		7,500,000
Annual debt service savings		1,173,000
Line of Credit, available					$ 13,000,000
Westwood Hills, LLC [Member]
Mortgage Financings and Line of Credit [Line Items]
Interest rate		9.21%
FREIT [Member]
Mortgage Financings and Line of Credit [Line Items]
Loan amount, new							$ 14,400,000
New Jersey Division of Taxation [Member]
Mortgage Financings and Line of Credit [Line Items]
Outstanding balance				$ 16,864,361
FREIT Maryland [Member]
Mortgage Financings and Line of Credit [Line Items]
Loan amount, new		$ 25,000,000					$ 7,500,000
Available to draw		$ 7,500,000
FREIT Maryland [Member] | Maximum [Member]
Mortgage Financings and Line of Credit [Line Items]
Fixed interest rate on old loan		5.37%
FREIT Maryland [Member] | Minimum [Member]
Mortgage Financings and Line of Credit [Line Items]
Fixed interest rate on old loan		2.85%
FREIT [Member]
Mortgage Financings and Line of Credit [Line Items]
Maturity date of loan		Jan. 01, 2024
Line of Credit [Member]
Mortgage Financings and Line of Credit [Line Items]
Interest rate		$ 13,000,000
Basis points, interest rate		3.75%