Mortgages payable and credit line (Details) - USD ($)									1 Months Ended									3 Months Ended	12 Months Ended			13 Months Ended
	Jan. 10, 2022	Jan. 07, 2022	Feb. 06, 2021	Feb. 01, 2021	Apr. 03, 2019	Feb. 07, 2018	Dec. 07, 2017	Jan. 14, 2013	Aug. 19, 2022	Jul. 22, 2022	Dec. 30, 2021	Sep. 30, 2020	Aug. 26, 2019	Apr. 28, 2017	Dec. 29, 2014	Nov. 19, 2013	Dec. 26, 2012	Jun. 30, 2020	Oct. 31, 2022	Oct. 31, 2021	May 30, 2019	May 30, 2018	Nov. 22, 2021	Mar. 05, 2021	Feb. 28, 2020	Apr. 22, 2016
Mortgages payable and credit line (Details) [Line Items]
Refinanced loan amount						$ 115,300,000		$ 8,000,000		$ 22,100,000	$ 14,400,000	$ 19,200,000	$ 17,000,000	$ 22,000,000			$ 20,000,000
Loan amount			$ 118,500,000		$ 22,500,000	$ 118,500,000	$ 12,350,000	$ 22,750,000		$ 25,000,000	7,500,000	25,000,000	$ 28,815,000	$ 23,500,000		$ 11,200,000								$ 118,500,000	$ 121,900,000	$ 2,320,000
Additional funding											$ 7,500,000	$ 250,000
Maturity date of loan						Feb. 06, 2021	Dec. 15, 2027			Aug. 01, 2025	Jan. 01, 2024	Oct. 01, 2022		Apr. 28, 2019		Dec. 01, 2013	Jan. 03, 2023		Oct. 31, 2023
Term of the loan							2 years			3 years	1 year		5 years
Net proceeds from refinancing of debt										$ 1,100,000	$ 1,173,000	$ 5,600,000	$ 11,600,000	$ 1,100,000
Fixed interest rate							4.35%	4.75%					3.54%	5.55%	3.75%	4.54%
Net book value																			$ 22,642,000
Monthly princial payments				$ 49,250	$ 47,250			$ 129,702		1,250,000			$ 85,004			$ 57,456		$ 390,000
Deferred Interest																		$ 222,000
Fixed interest rate													6.09%
Future periodic payment including principal													$ 130,036
Deferred interest										$ 136,000
Fixed interest rate tranche one										5.00%							3.81%
Legal fees										$ 1,250,000
Annual debt service savings										$ 340,000
Total deferred payments																			1,400,000
construction progress amount																			700,000
Escrow account balance																			931,000				$ 15,526,731
Fixed interest rate tranche two																	3.53%
Outstanding balance	$ 18,200,000	$ 21,100,000									$ 116,500,000
Principal payment amount															$ 27,807						$ 45,250	$ 43,250
Net book value																			17,652,000
LIBOR rate						3.00%						4.15%												3.00%	3.00%
Drawn loan amount						$ 121,900,000
Principal payments			$ 500,000
Line of Credit, available																			$ 13,000,000
Basis points, interest rate																			3.75%
Line of credit																			$ 13,000,000	$ 13,000,000
Red Bank Nj Refinanced Mortgage [Member]
Mortgages payable and credit line (Details) [Line Items]
Net book value																			18,245,000
Maximum [Member]
Mortgages payable and credit line (Details) [Line Items]
Fixed interest rate										5.00%	5.37%
Fixed interest rate												4.62%
Minimum [Member]
Mortgages payable and credit line (Details) [Line Items]
Fixed interest rate										3.625%	2.85%
Fixed interest rate												4.15%
Line of Credit [Member]
Mortgages payable and credit line (Details) [Line Items]
Refinanced loan amount															$ 16,200,000
Westwood Hills Property [Member]
Mortgages payable and credit line (Details) [Line Items]
Net proceeds from refinancing of debt												$ 2,200,000
Percentage of membership interest												40.00%
Loan agreement description									On August 19, 2022, Westwood Hills, LLC exercised its right, pursuant to the loan agreement, to extend the term of its $25 million loan on its property located in Westwood, New Jersey, for an additional six (6) months from an initial maturity date of October 1, 2022 to a new maturity date of April 1, 2023. This loan was extended on the same terms and conditions as stated in the loan agreement and has one remaining six (6) month extension. As of October 31, 2022, $25,000,000 of this loan was drawn and outstanding and the interest rate was 7.13%. The mortgage is secured by an apartment building in Westwood, New Jersey having a net book value of approximately $7,864,000 as of October 31, 2022.
Rockaway, New Jersey [Member]
Mortgages payable and credit line (Details) [Line Items]
Net book value																			14,228,000
Westwood, New Jersey [Member]
Mortgages payable and credit line (Details) [Line Items]
Net book value																			7,062,000
Wayne, New Jersey [Member]
Mortgages payable and credit line (Details) [Line Items]
Net book value																			1,593,000
River Edge, New Jersey [Member]
Mortgages payable and credit line (Details) [Line Items]
Net book value																			$ 877,000
Middletown, NY Mortgage [Member] | Line of Credit [Member]
Mortgages payable and credit line (Details) [Line Items]
Maturity date of loan															Dec. 15, 2024