XML 76 R67.htm IDEA: XBRL DOCUMENT
v3.23.3

SUBSEQUENT EVENTS (Details) | 1 Months Ended | 2 Months Ended | 9 Months Ended | 193 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Nov. 08, 2023 USD ($) $ / item shares | Nov. 30, 2023 shares | Sep. 30, 2023 USD ($) shares | Sep. 30, 2022 USD ($) shares | Sep. 30, 2023 USD ($) $ / item shares | Nov. 07, 2023 $ / item | Aug. 31, 2023 $ / item
Subsequent events |  |  |  |  |  |  |
Number of depository receipts repurchased |  |  |  |  | 1,517,690 |  |
Repurchase price of depository receipts (in dollars per receipt) | $ / item |  |  |  |  | 30.96 |  |
Total cost of repurchase | $ |  |  | $ 2,657,477 | $ 5,167,667 | $ 53,153,000 |  |
Units required to be repurchased (in shares) |  |  | 1,218 | 2,192 |  |  |
Quarterly distributions per depositary receipt (in dollars per receipt) | $ / item |  |  |  |  |  |  | 0.40
Class B |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Number of depository receipts repurchased |  |  |  |  | 4,279 |  |
Total cost of repurchase | $ |  |  | $ 503,707 | $ 981,249 |  |  |
General Partnership |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Number of depository receipts repurchased |  |  |  |  | 225 |  |
Total cost of repurchase | $ |  |  | $ 26,510 | $ 51,645 |  |  |
Units required to be repurchased (in shares) |  |  | 12 |  |  |  |
Subsequent event |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Number of depository receipts repurchased | 859 |  |  |  |  |  |
Repurchase price of depository receipts (in dollars per receipt) | $ / item | 67.05 |  |  |  |  |  |
Price per unit of depository receipts | $ / item | 2,011.50 |  |  |  |  |  |
Total cost of repurchase | $ | $ 57,996 |  |  |  |  |  |
Quarterly distribution (per unit) | $ / item |  |  |  |  |  | 12.00 |
Quarterly distributions per depositary receipt (in dollars per receipt) | $ / item |  |  |  |  |  | 0.40 |
Subsequent event | Class B |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Units required to be repurchased (in shares) |  | 7 |  |  |  |  |
Value of units required to be repurchased | $ | $ 13,679 |  |  |  |  |  |
Subsequent event | General Partnership |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |
Units required to be repurchased (in shares) | 0.4 |  |  |  |  |  |
Value of units required to be repurchased | $ | $ 720 |  |  |  |  |  |

X
- Definition Represents the number of depository receipts repurchased under the equity repurchase program. + References No definition available. + Details
Name: | nen_PartnersCapitalAccountDepositoryReceiptsTreasury
Namespace Prefix: | nen_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the average price at which depository receipts are repurchased under the equity repurchase program. + References No definition available. + Details
Name: | nen_PartnersCapitalAccountDepositoryReceiptsTreasuryAverageRepurchasePricePerDepositoryReceipt
Namespace Prefix: | nen_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the cost per unit of depository receipts. + References No definition available. + Details
Name: | nen_PartnersCapitalAccountDepositoryReceiptsTreasuryPricePerUnit
Namespace Prefix: | nen_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the quarterly distributions per depository receipt. + References No definition available. + Details
Name: | nen_PartnersCapitalAccountQuarterlyDistributionPerDepositoryReceipt
Namespace Prefix: | nen_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the quarterly distributions per unit. + References No definition available. + Details
Name: | nen_PartnersCapitalAccountQuarterlyDistributionPerUnit
Namespace Prefix: | nen_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the value of the units required to be repurchased. + References No definition available. + Details
Name: | nen_UnitRepurchasesRequiredValue
Namespace Prefix: | nen_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Value of units that were previously issued and have been repurchased during the year. + References No definition available. + Details
Name: | us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Units that were previously issued and have been repurchased during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-5 + Details
Name: | us-gaap_PartnersCapitalAccountUnitsTreasury
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481674/830-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 855 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483399/855-10-50-2 + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=nen_LimitedClassBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PartnerTypeOfPartnersCapitalAccountAxis=us-gaap_GeneralPartnerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |