XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.19.1

RENTAL INCOME (Commercial Leases) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) ft² item
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 2,898,984
Total square feet for expiring leases | ft² | 106,683
Total number of leases expiring | item | 45
Percentage of annual base rent for expiring leases | 100.00%
Through December 31, 2019 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 459,408
Total square feet for expiring leases | ft² | 22,120
Total number of leases expiring | item | 11
Percentage of annual base rent for expiring leases | 16.00%
Through December 31, 2020 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 232,198
Total square feet for expiring leases | ft² | 5,959
Total number of leases expiring | item | 8
Percentage of annual base rent for expiring leases | 8.00%
Through December 31, 2021 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 835,995
Total square feet for expiring leases | ft² | 40,586
Total number of leases expiring | item | 7
Percentage of annual base rent for expiring leases | 29.00%
Through December 31, 2022 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 554,214
Total square feet for expiring leases | ft² | 14,355
Total number of leases expiring | item | 7
Percentage of annual base rent for expiring leases | 19.00%
Through December 31, 2023 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 444,280
Total square feet for expiring leases | ft² | 13,591
Total number of leases expiring | item | 6
Percentage of annual base rent for expiring leases | 15.00%
Through December 31, 2024 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 230,439
Total square feet for expiring leases | ft² | 6,222
Total number of leases expiring | item | 5
Percentage of annual base rent for expiring leases | 8.00%
Through December 31, 2025 |
RENTAL INCOME |
Percentage of annual base rent for expiring leases | 0.00%
Through December 31, 2026 |
RENTAL INCOME |
Percentage of annual base rent for expiring leases | 0.00%
Through December 31, 2027 |
RENTAL INCOME |
Percentage of annual base rent for expiring leases | 0.00%
Through December 31, 2028 |
RENTAL INCOME |
Percentage of annual base rent for expiring leases | 0.00%
Through December 31, 2029 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 142,450
Total square feet for expiring leases | ft² | 3,850
Total number of leases expiring | item | 1
Percentage of annual base rent for expiring leases | 5.00%
Through December 31, 2030 |
RENTAL INCOME |
Percentage of annual base rent for expiring leases | 0.00%

X
- Definition Represents the amount of annual rent to be receivable for leases to be expired. + References No definition available. + Details
Name: | nen_OperatingLeasesAnnualBaseRentForExpiringLeases
Namespace Prefix: | nen_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the number of leases to be expired. + References No definition available. + Details
Name: | nen_OperatingLeasesNumberOfLeasesExpiring
Namespace Prefix: | nen_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of annual base rent for leases to be expired. + References No definition available. + Details
Name: | nen_OperatingLeasesPercentageOfAnnualBaseRentForExpiringLeases
Namespace Prefix: | nen_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the square feet area of rental properties for which leases are to be expired. + References No definition available. + Details
Name: | nen_OperatingLeasesSquareFeetForExpiringLeases
Namespace Prefix: | nen_
Data Type: | num:areaItemType
Balance Type: | na
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_OperatingLeasedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeasesExpirationPeriodYearTenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeaseExpirationPeriodYearElevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LeaseArrangementTypeAxis=nen_OperatingLeaseExpirationPeriodYearTwelveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |