Represents the amount of quarterly fee for asset management consulting services.

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Represents the number of limited partnerships and limited liability companies in which the entity has made investments which are accounted for using the equity method of consolidation.

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Number of employees, excluding President, having ownership interest in the investment properties.

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Represents the amount charged for bookkeeping and accounting services per year as included in administrative expenses.

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Represents the charge against earnings towards management fees associated with the services provided by related party.

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Represents the management fees expressed as a percentage of Linewt.

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Represents the management fee expressed as a percentage of rental revenues from properties owned.

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Represents the number of employees who perform accounting and bookkeeping functions.

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The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of cost for defined contribution plan.

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The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

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Amount of the cost of borrowed funds accounted for as interest expense.

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The amount of cash paid for brokerage fees during the current period. This element is intended to represent the brokerage fees paid by and between financial industry participants.

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A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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Amount of transactions with related party during the financial reporting period.

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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RELATED PARTY TRANSACTIONS (Details)	3 Months Ended		6 Months Ended		9 Months Ended		18 Months Ended
RELATED PARTY TRANSACTIONS (Details)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2018 USD ($) item	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Sep. 29, 2017 USD ($)	Jul. 06, 2017 USD ($)
RELATED PARTY TRANSACTIONS
Management fee as percentage of gross receipts rental revenue					4.00%
Management fee as a percentage of gross receipts rental revenue of Linewt, LLC					3.00%
Management fees of related party					$ 1,741,000	$ 1,600,000
Management fee	$ 590,908	$ 544,399			1,740,766	1,599,647
Repairs and maintenance	2,951,750	2,678,780			7,081,073	6,187,673
Administrative expense	526,100	525,125			$ 1,613,891	1,513,869
Number of limited partnerships and limited liability companies in which the entity has invested \| item					8
Interest expense	$ 3,090,471	$ 3,046,818			$ 9,331,023	8,113,197
Woodland Park Apartments LLC Newton Massachusetts
RELATED PARTY TRANSACTIONS
Loan amount								$ 22,250,000	$ 16,000,000
Interest rate (as a percent)								3.79%	4.75%
Dexter Park
RELATED PARTY TRANSACTIONS
Management fee as percentage of gross receipts rental revenue					2.00%
President of Management Company
RELATED PARTY TRANSACTIONS
Quarterly fee for asset management consulting services			$ 37,500	$ 37,500
Harold Brown \| Minimum
RELATED PARTY TRANSACTIONS
Ownership interest (as a percent)	43.20%				43.20%
Harold Brown \| Maximum
RELATED PARTY TRANSACTIONS
Ownership interest (as a percent)	56.00%				56.00%
General Partner or Management Company [Member]
RELATED PARTY TRANSACTIONS
Repairs and maintenance					$ 296,000
Administrative expense					260,000
Commercial brokerage fees					34,000
Expenses for construction, architectural services and supervision of capital projects					427,000
Costs related to professional services					1,016,000	609,000
Management Company [Member]
RELATED PARTY TRANSACTIONS
Reimbursement to related party for payroll transfers					$ 2,480,000	$ 2,508,000
Employer contributions in 401K plan			0	0
Number of accounting staff of related party providing bookkeeping and accounting functions \| item					14
Fees for accounting and bookkeeping services			$ 93,750	$ 93,750
Number of employees having ownership interest in the investment properties \| item					6
Fees for accounting and bookkeeping services per year							$ 125,000
Partially owned properties
RELATED PARTY TRANSACTIONS
Management fee as percentage of gross receipts rental revenue					4.00%
Management fee					$ 493,000
Repairs and maintenance					42,000
Administrative expense					50,000
Construction, architectural services and supervision of capital projects					204,000
Commercial brokerage fees					178,000
Amount paid to related party					$ 967,000
Residential and mixed-use properties \| Partially owned properties \| Minimum
RELATED PARTY TRANSACTIONS
Ownership interest (as a percent)	40.00%				40.00%
Residential and mixed-use properties \| Partially owned properties \| Maximum
RELATED PARTY TRANSACTIONS
Ownership interest (as a percent)	50.00%				50.00%