RENTAL PROPERTIES (Hamilton Green) (Details) - USD ($)		9 Months Ended
Aug. 03, 2016	Sep. 30, 2016
RENTAL PROPERTIES
Gain on the sale of real estate		$ (103,793)
Hamilton Green
RENTAL PROPERTIES
Sales price of real estate properties	$ 1,000,000
Gain on the sale of real estate	103,793
Closing costs	227,663
Cost basis of the property	668,544
Prepayment penalty	$ 187,905

Represents the closing costs associated with the transaction.

No definition available.

Name:	nen_ClosingCosts
Namespace Prefix:	nen_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the carrying value of the property.

+ References

No definition available.

+ Details

Name:	nen_CostBasisOfProperty
Namespace Prefix:	nen_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the penalty amount for early repayment of debt.

+ References

No definition available.

+ Details

Name:	nen_PrepaymentPenalty
Namespace Prefix:	nen_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the aggregate sales price of real estate properties sold by the entity.

+ References

No definition available.

+ Details

Name:	nen_RealEstatePropertySalesPrice
Namespace Prefix:	nen_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228

+ Details

Name:	us-gaap_GainLossOnDispositionOfAssets1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_RealEstatePropertiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_LegalEntityAxis=nen_HamiltonGreenApartmentsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: