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v2.4.1.9

Statements of Operations (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Gain (loss) on trading of commodity futures contracts: |  |  |
Realized gain (loss) on closed positions | $ 2,205,950 us-gaap_GainLossOnSaleOfInvestments | $ 2,395,300 us-gaap_GainLossOnSaleOfInvestments | $ (12,161,650)us-gaap_GainLossOnSaleOfInvestments
Change in unrealized gain (loss) on open positions | (6,009,940)us-gaap_UnrealizedGainLossOnInvestments | 1,996,630 us-gaap_UnrealizedGainLossOnInvestments | 7,676,740 us-gaap_UnrealizedGainLossOnInvestments
Dividend income | 2,798 us-gaap_DividendIncomeOperating | 4,719 us-gaap_DividendIncomeOperating | 4,189 us-gaap_DividendIncomeOperating
Interest income | 2,288 us-gaap_InterestIncomeOperating | 4,481 us-gaap_InterestIncomeOperating | 7,257 us-gaap_InterestIncomeOperating
ETF transaction fees | 5,600 us-gaap_FeesAndCommissions | 9,450 us-gaap_FeesAndCommissions | 10,500 us-gaap_FeesAndCommissions
Total income (loss) | (3,793,304)us-gaap_Revenues | 4,410,580 us-gaap_Revenues | (4,462,964)us-gaap_Revenues
Expenses |  |  |
General Partner management fees (Note 3) | 143,944 us-gaap_AssetManagementCosts | 250,075 us-gaap_AssetManagementCosts | 283,719 us-gaap_AssetManagementCosts
Professional fees | 150,833 us-gaap_ProfessionalFees | 150,502 us-gaap_ProfessionalFees | 125,273 us-gaap_ProfessionalFees
Brokerage commissions | 3,918 us-gaap_FloorBrokerageExchangeAndClearanceFees | 8,360 us-gaap_FloorBrokerageExchangeAndClearanceFees | 14,360 us-gaap_FloorBrokerageExchangeAndClearanceFees
Directors' fees and insurance | 6,009 us-gaap_NoninterestExpenseDirectorsFees | 7,620 us-gaap_NoninterestExpenseDirectorsFees | 5,705 us-gaap_NoninterestExpenseDirectorsFees
License fees | 2,879 us-gaap_LicenseCosts | 5,001 us-gaap_LicenseCosts | 5,674 us-gaap_LicenseCosts
Total expenses | 307,583 us-gaap_OperatingExpenses | 421,558 us-gaap_OperatingExpenses | 434,731 us-gaap_OperatingExpenses
Expense waiver (Note 3) | (128,906)unl_ExpenseWaiver | (100,580)unl_ExpenseWaiver | (68,503)unl_ExpenseWaiver
Net expenses | 178,677 unl_NetOperatingExpenses | 320,978 unl_NetOperatingExpenses | 366,228 unl_NetOperatingExpenses
Net income (loss) | $ (3,971,981)us-gaap_NetIncomeLoss | $ 4,089,602 us-gaap_NetIncomeLoss | $ (4,829,192)us-gaap_NetIncomeLoss
Net income (loss) per limited partnership share | $ (4.63)us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ 1.09 us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax | $ (3.98)us-gaap_NetIncomeLossPerOutstandingLimitedPartnershipUnitBasicNetOfTax
Net income (loss) per weighted average limited partnership share | $ (3.85)us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ 2.19 us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted | $ (2.26)us-gaap_NetIncomeLossNetOfTaxPerOutstandingLimitedPartnershipUnitDiluted
Weighted average limited partnership shares outstanding | 1,031,781 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding | 1,866,712 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding | 2,132,514 us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding

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