XML 108 R9999.htm IDEA: XBRL DOCUMENT
v3.3.1.900

Label | Element | Value
--- | --- | ---
Hamilton Bay L L C [Member] |  |
Partners' Capital Account, Contributions | us-gaap_PartnersCapitalAccountContributions | $ 660,000
Hamilton Essex81 L L C [Member] |  |
Partners' Capital Account, Contributions | us-gaap_PartnersCapitalAccountContributions | 100,000
Partners' Capital Account, Distributions | us-gaap_PartnersCapitalAccountDistributions | 978,193
Hamilton Essex81 L L C [Member] | Maximum [Member] |  |
Equity Method Investments, Carrying Value | nen_EquityMethodInvestmentsCarryingValue | 0
Hamilton Essex Development L L C [Member] |  |
Partners' Capital Account, Contributions | us-gaap_PartnersCapitalAccountContributions | $ 978,193
Mortgage2.18 Percent Plus Libor September2015 [Member] | Hamilton Essex81 L L C [Member] | Hamilton Essex81 L L C [Member] |  |
Debt Instrument, Term | us-gaap_DebtInstrumentTerm | 10 years

X
- Definition Represents the carrying value of equity method investment as of the balance sheet date. + References No definition available. + Details
Name: | nen_EquityMethodInvestmentsCarryingValue
Namespace Prefix: | nen_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total contributions made by 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 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
Name: | us-gaap_PartnersCapitalAccountContributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 + Details
Name: | us-gaap_PartnersCapitalAccountDistributions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
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Balance Type: |
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X
- Details
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Namespace Prefix: |
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Balance Type: |
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X
- Details
Name: | us-gaap_DebtInstrumentAxis=nen_Mortgage2.18PercentPlusLiborSeptember2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=nen_HamiltonEssex81LLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |