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RENTAL INCOME (Tables) | 6 Months Ended
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Jun. 30, 2018
RENTAL INCOME |
Schedule of minimum future annual rental income on non-cancellable operating leases | Approximately 7% was related to commercial properties, which have minimum future annual rental income on non-cancellable operating leases at June 30, 2018 as follows:
|  | Commercial |
|  | Property Leases |
2019 |  | $ | 2,720,000 |
2020 |  |  | 2,251,000 |
2021 |  |  | 2,071,000 |
2022 |  |  | 1,164,000 |
2023 |  |  | 737,000 |
Thereafter |  |  | 977,000 |
|  | $ | 9,920,000 |
Schedule of information for commercial leases |
|  | Annual base |  |  |  |  |  | Percentage of |
|  | rent for |  | Total square feet |  | Total number of |  | annual base rent for |
Through June 30, |  | expiring leases |  | for expiring leases |  | leases expiring |  | expiring leases |
2019 |  | $ | 303,325 |  | 13,980 |  | 12 |  | 10 | %
2020 |  |  | 500,471 |  | 17,383 |  | 9 |  | 17 | %
2021 |  |  | 686,602 |  | 27,388 |  | 8 |  | 23 | %
2022 |  |  | 579,290 |  | 23,267 |  | 6 |  | 19 | %
2023 |  |  | 397,553 |  | 10,507 |  | 6 |  | 13 | %
2024 |  |  | 379,671 |  | 11,668 |  | 4 |  | 13 | %
2025 |  |  | — |  | — |  | — |  | — | %
2026 |  |  | — |  | — |  | — |  | — | %
2027 |  |  | — |  | — |  | — |  | — | %
2028 |  |  | — |  | — |  | — |  | — | %
2029 |  |  | 142,450 |  | 3,850 |  | 1 |  | 5 | %
Totals |  | $ | 2,989,362 |  | 108,043 |  | 46 |  | 100 | %

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- Definition Tabular disclosure of information related to commercial leases, including annual base rent, total square feet, total number, and percentage of annual base rent for expiring leases. + References No definition available. + Details
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Data Type: | nonnum:textBlockItemType
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- Definition Tabular disclosure of future minimum rental receivable in the aggregate and for each of the five succeeding fiscal years for noncancelable operating leases. + References No definition available. + Details
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Namespace Prefix: | nen_
Data Type: | nonnum:textBlockItemType
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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration