XML 44 R34.htm IDEA: XBRL DOCUMENT
v3.25.3

RENTAL INCOME (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
RENTAL INCOME. |
Schedule of minimum future annual rental income on non-cancellable operating leases | ​
​ | ​ | ​ | ​ | ​
​ |  | Commercial |
​ | ​ | Property Leases |
2026 | ​ | $ | 3,893,699 | ​
2027 | ​ |  | 3,238,918 | ​
2028 | ​ |  | 2,807,987 | ​
2029 | ​ |  | 2,196,741 | ​
2030 | ​ |  | 1,711,516 | ​
Thereafter | ​ |  | 8,046,620 | ​
​ | ​ | $ | 21,895,481 | ​
Schedule of information for commercial leases | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Annual base |  | ​ |  | ​ |  | Percentage of |
​ | ​ | rent for | ​ | Total square feet | ​ | Total number of | ​ | annual base rent for |
Through September 30, | ​ | expiring leases | ​ | for expiring leases | ​ | leases expiring | ​ | expiring leases |
2026 | ​ | $ | 541,546 | ​ | 26,565 | ​ | 27 | ​ | 13 | %
2027 | ​ |  | 738,806 | ​ | 23,066 | ​ | 12 | ​ | 18 | %
2028 | ​ |  | 348,885 | ​ | 9,458 | ​ | 5 | ​ | 8 | %
2029 | ​ |  | 726,517 | ​ | 22,210 | ​ | 9 | ​ | 17 | %
2030 | ​ |  | 164,448 | ​ | 5,378 | ​ | 4 | ​ | 4 | %
2031 | ​ |  | — | ​ | — | ​ | — | ​ | — | %
2032 | ​ |  | 110,600 | ​ | 1,106 | ​ | 1 | ​ | 3 | %
2033 | ​ |  | — | ​ | — | ​ | — | ​ | — | %
2034 | ​ | ​ | 533,784 | ​ | 20,897 | ​ | 2 | ​ | 13 | %
2035 | ​ | ​ | — | ​ | — | ​ | — | ​ | — | %
Thereafter | ​ | ​ | 1,003,246 | ​ | 27,801 | ​ | 4 | ​ | 24 | %
Totals | ​ | $ | 4,167,832 |  | 136,481 |  | 64 |  | 100 | %

X
- 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
Name: | nen_ScheduleOfCommercialLeaseInformationTableTextBlock
Namespace Prefix: | nen_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | nen_ScheduleOfFutureMinimumPaymentsReceivableFromOperatingLeasesTableTextBlock
Namespace Prefix: | nen_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration