XML 73 R63.htm IDEA: XBRL DOCUMENT
v3.10.0.1

INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Details) | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 28, 2007 item | Jun. 30, 2018 USD ($) property item | Jun. 30, 2017 USD ($) item | Dec. 31, 2017 USD ($) item
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Number of limited partnerships and limited liability companies in which the entity has invested |  | 8 |  |
Number of partnerships investing in commercial property |  | 3 |  |
Investments in joint venture | $ |  | $ 2,298,588 | $ 9,029,233 | $ 7,212,044
Number of units |  |  | 1,033 |
Outstanding amount of mortgage | $ |  | 253,185,372 |  | $ 233,221,258
Number of units sold |  |  | 278 |
Number of units retained for long-term investment |  |  | (690) |
Unsold units |  |  | 65 |
Distribution to the Partnership | $ |  | 2,238,962 | $ 2,239,168 |
Investment Properties |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Investments in joint venture | $ |  | $ 2,298,596 |  |
Number of units | property |  | 1,033 |  |
Number of units sold | property |  | 215 |  |
Number of units retained for long-term investment | property |  | (690) |  |
Unsold units | property |  | 8 |  |
Hamilton Bay Apts |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Number of units sold |  |  |  | 29
Number of units refinanced | 48 |  |  |
Gain on the sale of real estate | $ |  |  |  | $ 3,628,000
Hamilton Bay Sales |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Number of units |  | 6 |  |
Number of units sold |  | 12 |  |
Gain on the sale of real estate | $ |  | $ 1,751,000 |  |
345 Franklin | Mortgages payable |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Outstanding amount of mortgage | $ |  | $ 9,649,000 |  |
Condominium |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Number of units |  | 19 |  |
Residential buildings |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Number of units |  |  | 1,030 |
Residential buildings | Investment Properties |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Number of units | property |  | 1,030 |  |
Commercial |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Number of units |  |  | 3 |
Commercial | Investment Properties |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Number of units | property |  | 3 |  |
Minimum | Mortgages payable |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Interest rate (as a percent) |  | 3.76% |  |
Minimum | Harold Brown |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Ownership interest (as a percent) |  | 43.20% |  |
Maximum | Mortgages payable |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Interest rate (as a percent) |  | 5.81% |  |
Maximum | Harold Brown |  |  |  |
INVESTMENT IN UNCONSOLIDATED JOINT VENTURES |  |  |  |
Ownership interest (as a percent) |  | 56.00% |  |

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

X
- Definition Represents the number of partnerships which are investing in commercial properties. + References No definition available. + Details
Name: | nen_NumberOfPartnershipsInvestingInCommercialProperties
Namespace Prefix: | nen_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of units in a real estate property refinanced. + References No definition available. + Details
Name: | nen_NumberOfUnitsInRealEstatePropertyRefinanced
Namespace Prefix: | nen_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of units retained for long-term investment. + References No definition available. + Details
Name: | nen_NumberOfUnitsInRealEstatePropertyRetainedForLongTermInvestment
Namespace Prefix: | nen_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of units sold. + References No definition available. + Details
Name: | nen_NumberOfUnitsInRealEstatePropertySold
Namespace Prefix: | nen_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of units unsold by the entity. + References No definition available. + Details
Name: | nen_NumberOfUnitsInRealEstatePropertyUnsold
Namespace Prefix: | nen_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721525-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e957-107759 + Details
Name: | us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_EquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total distributions to each class of partners (i.e., general, limited and preferred partners). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_PartnersCapitalAccountDistributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_SecuredDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=nen_InvestmentPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=nen_HamiltonBayApartmentsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=nen_HamiltonBayLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=nen_Franklin345LLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=nen_CondominiumRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=nen_HaroldBrownMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |