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RENTAL INCOME (Commercial Leases) (Details) | 9 Months Ended
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Sep. 30, 2022 USD ($) ft² item
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 2,211,981
Total square feet for expiring leases | ft² | 108,369
Total number of leases expiring | item | 52
Percentage of annual base rent for expiring leases | 100.00%
2023 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 430,143
Total square feet for expiring leases | ft² | 55,286
Total number of leases expiring | item | 22
Percentage of annual base rent for expiring leases | 19.00%
2024 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 785,710
Total square feet for expiring leases | ft² | 26,248
Total number of leases expiring | item | 13
Percentage of annual base rent for expiring leases | 37.00%
2025 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 135,210
Total square feet for expiring leases | ft² | 2,461
Total number of leases expiring | item | 4
Percentage of annual base rent for expiring leases | 6.00%
2026 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 198,266
Total square feet for expiring leases | ft² | 5,396
Total number of leases expiring | item | 4
Percentage of annual base rent for expiring leases | 9.00%
2027 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 269,210
Total square feet for expiring leases | ft² | 11,716
Total number of leases expiring | item | 5
Percentage of annual base rent for expiring leases | 12.00%
2028 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 93,873
Total square feet for expiring leases | ft² | 2,158
Total number of leases expiring | item | 1
Percentage of annual base rent for expiring leases | 4.00%
2029 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 181,324
Total square feet for expiring leases | ft² | 5,104
Total number of leases expiring | item | 2
Percentage of annual base rent for expiring leases | 8.00%
Thereafter |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 118,245
Total number of leases expiring | item | 1
Percentage of annual base rent for expiring leases | 5.00%

X
- Definition Represents the amount of annual rent to be receivable for leases to be expired. + References No definition available. + Details
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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
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Namespace Prefix: | nen_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the square feet area of rental properties for which leases are to be expired. + References No definition available. + Details
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Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | duration

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- 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
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- Details
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