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RENTAL INCOME (Commercial Leases) (Details) | 6 Months Ended
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Jun. 30, 2025 USD ($) ft² item
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 4,070,826
Total square feet for expiring leases | ft² | 136,481
Total number of leases expiring | item | 64
Percentage of annual base rent for expiring leases | 100.00%
2026 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 459,785
Total square feet for expiring leases | ft² | 26,520
Total number of leases expiring | item | 26
Percentage of annual base rent for expiring leases | 11.00%
2027 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 639,314
Total square feet for expiring leases | ft² | 19,926
Total number of leases expiring | item | 11
Percentage of annual base rent for expiring leases | 16.00%
2028 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 436,121
Total square feet for expiring leases | ft² | 12,454
Total number of leases expiring | item | 7
Percentage of annual base rent for expiring leases | 11.00%
2029 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 402,289
Total square feet for expiring leases | ft² | 10,033
Total number of leases expiring | item | 6
Percentage of annual base rent for expiring leases | 10.00%
2030 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 541,212
Total square feet for expiring leases | ft² | 18,405
Total number of leases expiring | item | 8
Percentage of annual base rent for expiring leases | 13.00%
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%
2034 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 533,784
Total square feet for expiring leases | ft² | 20,897
Total number of leases expiring | item | 2
Percentage of annual base rent for expiring leases | 13.00%
Thereafter |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 947,721
Total square feet for expiring leases | ft² | 27,140
Total number of leases expiring | item | 3
Percentage of annual base rent for expiring leases | 23.00%

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
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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
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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
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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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