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RENTAL INCOME (Commercial Leases) (Details) | 12 Months Ended
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Dec. 31, 2023 USD ($) ft² item
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 3,564,888
Total square feet for expiring leases | ft² | 129,886
Total number of leases expiring | item | 59
Percentage of annual base rent for expiring leases | 100.00%
2024 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 416,581
Total square feet for expiring leases | ft² | 29,166
Total number of leases expiring | item | 29
Percentage of annual base rent for expiring leases | 12.00%
2025 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 253,320
Total square feet for expiring leases | ft² | 7,455
Total number of leases expiring | item | 7
Percentage of annual base rent for expiring leases | 7.00%
2026 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 361,731
Total square feet for expiring leases | ft² | 14,221
Total number of leases expiring | item | 8
Percentage of annual base rent for expiring leases | 10.00%
2027 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 309,189
Total square feet for expiring leases | ft² | 8,884
Total number of leases expiring | item | 5
Percentage of annual base rent for expiring leases | 9.00%
2028 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 251,316
Total square feet for expiring leases | ft² | 6,929
Total number of leases expiring | item | 2
Percentage of annual base rent for expiring leases | 7.00%
2029 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 433,890
Total square feet for expiring leases | ft² | 15,138
Total number of leases expiring | item | 3
Percentage of annual base rent for expiring leases | 12.00%
2032 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 110,600
Total square feet for expiring leases | ft² | 1,106
Total number of leases expiring | item | 1
Percentage of annual base rent for expiring leases | 3.00%
2033 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 1,428,261
Total square feet for expiring leases | ft² | 46,987
Total number of leases expiring | item | 4
Percentage of annual base rent for expiring leases | 40.00%

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

X
- 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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Namespace Prefix: | nen_
Data Type: | dtr-types: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
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- Details
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