XML 71 R62.htm IDEA: XBRL DOCUMENT
v3.22.2

SUBSEQUENT EVENTS (Details) | 1 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 31, 2022 $ / item | Aug. 05, 2022 USD ($) $ / item shares | Apr. 30, 2022 $ / item | Jan. 31, 2022 $ / item | Jun. 30, 2022 USD ($) $ / item shares | Jul. 31, 2022 USD ($) | Dec. 31, 2021 $ / item | Sep. 30, 2021 $ / item | Jun. 30, 2021 $ / item | Mar. 31, 2021 $ / item
Subsequent events |  |  |  |  |  |  |  |  |  |
Total cost of repurchase |  |  |  |  | $ 3,688,961 |  |  |  |  |
Units required to be repurchased (in shares) | shares |  |  |  |  | 1,574 |  |  |  |  |
Quarterly distribution per unit approved (in dollars per unit) | $ / item |  |  | 9.60 | 9.60 |  |  |  |  |  |
Quarterly distribution per unit (in dollars per unit) | $ / item |  |  |  | 0.32 |  |  | 0.32 | 0.32 | 0.32 | 0.32
Special distribution per depository receipt (in dollars per receipt) | $ / item |  |  |  | 1.28 |  |  |  |  |  |
Special distribution per unit (in dollars per unit) | $ / item |  |  |  | 38.40 |  |  |  |  |  |
Subsequent event |  |  |  |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |  |  |  |
Number of depository receipts repurchased | shares |  | 3,430 |  |  |  |  |  |  |  |
Repurchase price of depository receipts (in dollars per receipt) | $ / item |  | 78.18 |  |  |  |  |  |  |  |
Price per unit of depository receipts | $ / item |  | 2,345.40 |  |  |  |  |  |  |  |
Total cost of repurchase |  | $ 268,607 |  |  |  |  |  |  |  |
Quarterly distribution per unit approved (in dollars per unit) | $ / item | 9.60 |  |  |  |  |  |  |  |  |
Quarterly distribution per unit (in dollars per unit) | $ / item | 0.32 |  |  |  |  |  |  |  |  |
U.S Treasury Bills |  |  |  |  |  | $ 90,000,000 |  |  |  |
Class B |  |  |  |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |  |  |  |
Total cost of repurchase |  |  |  |  | $ 700,523 |  |  |  |  |
Value of units required to be repurchased |  |  |  |  | 700,523 |  |  |  |  |
Class B | Subsequent event |  |  |  |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |  |  |  |
Units required to be repurchased (in shares) | shares |  | 27 |  |  |  |  |  |  |  |
Value of units required to be repurchased |  | $ 63,687 |  |  |  |  |  |  |  |
General Partnership |  |  |  |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |  |  |  |
Total cost of repurchase |  |  |  |  | 36,869 |  |  |  |  |
Value of units required to be repurchased |  |  |  |  | $ 36,870 |  |  |  |  |
General Partnership | Subsequent event |  |  |  |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |  |  |  |
Units required to be repurchased (in shares) | shares |  | 1 |  |  |  |  |  |  |  |
Value of units required to be repurchased |  | $ 3,352 |  |  |  |  |  |  |  |
Class A |  |  |  |  |  |  |  |  |  |
Subsequent events |  |  |  |  |  |  |  |  |  |
Number of depository receipts repurchased | shares |  |  |  |  | 37,773 |  |  |  |  |
Repurchase price of depository receipts (in dollars per receipt) | $ / item |  |  |  |  | 78.09 |  |  |  |  |
Total cost of repurchase |  |  |  |  | $ 2,951,569 |  |  |  |  |

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_PartnersCapitalAccountDepositoryReciptsTreasuryPricePerUnit
Namespace Prefix: | nen_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of quarterly distribution per unit of limited partner interest. + References No definition available. + Details
Name: | nen_PartnersCapitalAccountQuarterlyDistributionPerUnitOfLimitedPartnerInterest
Namespace Prefix: | nen_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the amount of quarterly distribution per unit of limited partner interest approved by the Board of Advisors. + References No definition available. + Details
Name: | nen_PartnersCapitalAccountQuarterlyDistributionPerUnitOfLimitedPartnerInterestApproved
Namespace Prefix: | nen_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the special distribution per depository receipt. + References No definition available. + Details
Name: | nen_PartnersCapitalAccountSpecialDistributionPerDepositoryReceipt
Namespace Prefix: | nen_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of special distribution per unit of limited partner interest. + References No definition available. + Details
Name: | nen_PartnersCapitalAccountSpecialDistributionPerUnitOfLimitedPartnerInterest
Namespace Prefix: | nen_
Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

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 -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770 + 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 No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt (bills, notes or bonds) that are issued by the government of the United States which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References No definition available. + Details
Name: | us-gaap_USGovernmentSecuritiesAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

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_PartnerTypeOfPartnersCapitalAccountAxis=nen_LimitedClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |