XML 59 R5.htm IDEA: XBRL DOCUMENT
v2.4.1.9

CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (USD $) | Subtotal | Class A USD ($) | Class B USD ($) | General Partnership USD ($) | Treasury Units | Total USD ($)
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2013 |  | $ (17,485,327)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | $ (4,145,076)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | $ (218,160)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | $ (21,848,563)us-gaap_PartnersCapital
Balance (in units) at Dec. 31, 2013 | 180,225 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedAndGeneralMember | 144,180 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | 34,243 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | 1,802 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember | 50,738 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_TreasuryMember | 129,487 us-gaap_PartnersCapitalAccountUnits
Increase (Decrease) in Partners' Capital |  |  |  |  |  |
Distribution to Partners |  | (775,366)us-gaap_PartnersCapitalAccountDistributions / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | (184,149)us-gaap_PartnersCapitalAccountDistributions / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | (9,692)us-gaap_PartnersCapitalAccountDistributions / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | (969,207)us-gaap_PartnersCapitalAccountDistributions
Stock Buyback |  | (305,230)us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | (70,470)us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | (3,709)us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | (379,409)us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases
Stock Buyback (in units) |  |  |  |  | 271 us-gaap_PartnersCapitalAccountUnitsTreasury / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_TreasuryMember | (271)us-gaap_PartnersCapitalAccountUnitsTreasury
Net income (loss) |  | (23,691)us-gaap_NetIncomeLoss / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | (5,627)us-gaap_NetIncomeLoss / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | (296)us-gaap_NetIncomeLoss / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | (29,614)us-gaap_NetIncomeLoss
Balance at Mar. 31, 2014 |  | (18,589,614)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | (4,405,322)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | (231,857)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | (23,226,793)us-gaap_PartnersCapital
Balance (in units) at Mar. 31, 2014 | 180,225 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedAndGeneralMember | 144,180 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | 34,243 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | 1,802 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember | 51,009 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_TreasuryMember | 129,216 us-gaap_PartnersCapitalAccountUnits
Balance at Dec. 31, 2014 |  | (21,910,488)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | (5,184,335)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | (272,859)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | (27,367,682)us-gaap_PartnersCapital
Balance (in units) at Dec. 31, 2014 | 180,225 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedAndGeneralMember | 144,180 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | 34,243 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | 1,802 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember | 52,572 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_TreasuryMember | 127,653 us-gaap_PartnersCapitalAccountUnits
Increase (Decrease) in Partners' Capital |  |  |  |  |  |
Distribution to Partners |  | (761,064)us-gaap_PartnersCapitalAccountDistributions / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | (180,753)us-gaap_PartnersCapitalAccountDistributions / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | (9,513)us-gaap_PartnersCapitalAccountDistributions / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | (951,330)us-gaap_PartnersCapitalAccountDistributions
Stock Buyback |  | (975,731)us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | (230,574)us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | (12,135)us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | (1,218,440)us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases
Stock Buyback (in units) |  |  | (154)us-gaap_PartnersCapitalAccountUnitsTreasury / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | (8)us-gaap_PartnersCapitalAccountUnitsTreasury / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember | 809 us-gaap_PartnersCapitalAccountUnitsTreasury / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_TreasuryMember | (809)us-gaap_PartnersCapitalAccountUnitsTreasury
Net income (loss) |  | 327,726 us-gaap_NetIncomeLoss / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | 77,835 us-gaap_NetIncomeLoss / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | 4,097 us-gaap_NetIncomeLoss / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | 409,658 us-gaap_NetIncomeLoss
Balance at Mar. 31, 2015 |  | $ (23,319,557)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | $ (5,517,827)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | $ (290,410)us-gaap_PartnersCapital / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember |  | $ (29,127,794)us-gaap_PartnersCapital
Balance (in units) at Mar. 31, 2015 | 180,225 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedAndGeneralMember | 144,180 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassAMember | 34,243 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_LimitedClassBMember | 1,802 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_GeneralPartnerMember | 53,381 us-gaap_PartnersCapitalAccountUnits / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = nen_TreasuryMember | 126,844 us-gaap_PartnersCapitalAccountUnits

X
- Details
Name: | us-gaap_IncreaseDecreaseInPartnersCapitalRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 + Details
Name: | us-gaap_NetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of ownership interest of different classes of partners in limited partnership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
Name: | us-gaap_PartnersCapital
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total distributions to each class of partners (i.e., general, limited and preferred partners). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 + Details
Name: | us-gaap_PartnersCapitalAccountDistributions
Namespace Prefix: | us-gaap_
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 Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6828210&loc=d3e70191-108054 + Details
Name: | us-gaap_PartnersCapitalAccountTreasuryUnitsPurchases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of each class of partnership units outstanding at the balance sheet date. Units represent shares of ownership of the general, limited, and preferred partners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.16(a)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=27012166&loc=d3e187171-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 16 -Subparagraph a, b -Article 6 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04.16(b)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 + Details
Name: | us-gaap_PartnersCapitalAccountUnits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Units that were previously issued and have been repurchased during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=27012166&loc=d3e187171-122770 + Details
Name: | us-gaap_PartnersCapitalAccountUnitsTreasury
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration