XML 60 R48.htm IDEA: XBRL DOCUMENT
v3.6.0.2

ADVANCE RENTAL PAYMENTS AND SECURITY DEPOSITS (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015
ADVANCE RENTAL PAYMENTS AND SECURITY DEPOSITS |  |
Period for advance rental payment | 1 month |
Amount received for prepaid rent | $ 1,954,000 | $ 1,760,000
Security deposits | $ 2,381,000 | $ 2,257,000

X
- References No definition available. + Details
Name: | nen_AdvanceRentalPaymentsAndSecurityDepositsDisclosureAbstract
Namespace Prefix: | nen_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the period for which tenant may be required to pay rent in advance. + References No definition available. + Details
Name: | nen_PeriodForWhichRentToBePaidInAdvanceByTenant
Namespace Prefix: | nen_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents amounts received from tenants for prepaid rents which are included in cash and cash equivalents. + References No definition available. + Details
Name: | nen_PrepaidRentReceivedIncludedInCashAndCashEquivalents
Namespace Prefix: | nen_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of security deposits included in other assets and are classified as restricted cash. + References No definition available. + Details
Name: | nen_SecurityDepositIncludedInRestrictedCash
Namespace Prefix: | nen_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant