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RENTAL INCOME (Commercial Leases) (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) ft² item
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 2,878,719
Total square feet for expiring leases | ft² | 108,043
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 | $ | $ 467,961
Total square feet for expiring leases | ft² | 30,041
Total number of leases expiring | item | 21
Percentage of annual base rent for expiring leases | 16.00%
2024 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 661,688
Total square feet for expiring leases | ft² | 22,054
Total number of leases expiring | item | 13
Percentage of annual base rent for expiring leases | 23.00%
2025 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 102,329
Total square feet for expiring leases | ft² | 1,786
Total number of leases expiring | item | 3
Percentage of annual base rent for expiring leases | 4.00%
2026 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 347,891
Total square feet for expiring leases | ft² | 13,721
Total number of leases expiring | item | 6
Percentage of annual base rent for expiring leases | 12.00%
2027 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 197,585
Total square feet for expiring leases | ft² | 5,341
Total number of leases expiring | item | 4
Percentage of annual base rent for expiring leases | 7.00%
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 | 3.00%
2029 |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 38,874
Total square feet for expiring leases | ft² | 1,254
Total number of leases expiring | item | 1
Percentage of annual base rent for expiring leases | 1.00%
Thereafter |
RENTAL INCOME |
Annual base rent for expiring leases | $ | $ 968,518
Total square feet for expiring leases | ft² | 31,688
Total number of leases expiring | item | 3
Percentage of annual base rent for expiring leases | 34.00%

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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- 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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- 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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