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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2025
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS
Percentage of management fee in average daily total net assets			0.60%
Registration fees			$ 0	$ 0
Estimated directors' fees and expenses	$ 1,660	$ 4,991	$ 7,072	14,391	$ 18,000
Fee percentage			0.015%
Licensing fee incurred	$ 1,632	$ 2,194	$ 4,945	$ 7,021
Investor tax reporting cost					170,000
USL and the Related Public Funds
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS
Estimated directors' fees and expenses					$ 883,000

X

- Definition

Amount of registration fee expense for issuance of shares or units.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Subparagraph (m)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-3

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Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of expense for service provided by entity's director.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(14))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07(2)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479134/946-220-S99-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 220
-Name Accounting Standards Codification
-Section 45
-Paragraph 3
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479105/946-220-45-3

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X

- Definition

Amount of general expenses not normally included in Other Operating Costs and Expenses.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 48
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-48

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

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- Definition

Percentage of base fee.

+ References

No definition available.

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- Definition

Fees Paid and Related Party Transactions [Line Items]

+ References

No definition available.

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- Definition

It represent the value of license fees and other offering expenses.

+ References

No definition available.

+ Details

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X

- Definition

Percentage of Management Fee In Average Daily Total Net Assets.

+ References

No definition available.

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