XML 54 R37.htm IDEA: XBRL DOCUMENT v3.25.0.1

FAIR VALUE OF FINANCIAL INSTRUMENTS - Fair Value of Derivative Instruments (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
FAIR VALUE OF FINANCIAL INSTRUMENTS
Unrealized gain (loss) on open commodity futures contracts	$ 1,115,220	$ (4,450,405)
Commodity Contracts | Futures
FAIR VALUE OF FINANCIAL INSTRUMENTS
Unrealized gain (loss) on open commodity futures contracts	$ (1,115,220)	$ 4,450,405

X

- Definition

Amount of unrealized gain (loss) on open commodity futures contracts.

+ References

No definition available.

+ Details

Name:	unl_UnrealizedGainLossOnOpenCommodityFuturesContractsCurrentAndNonCurrent
Namespace Prefix:	unl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_DerivativesFairValueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CommodityContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_FutureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: