Note 2 - Principal Contracts and Agreements (Details Textual)	12 Months Ended
	Dec. 31, 2023 USD ($)
U.S. Bank N.A. [Member] | Custody Services [Member]
Related Party Transaction, Percentage of Average Gross Assets, Up to One Billion	0.0075%
Related Party Transaction, Percentage of Average Gross Assets, Over One Billion	0.005%
Global Fund Services [Member] | Transfer Agency, Fund Accounting and Fund Administration Services [Member]
Related Party Transaction, Percentage of Average Gross Assets, First 500 Million	0.05%
Related Party Transaction, Percentage of Average Gross Assets, Second 500 Million	0.04%
Related Party Transaction, Percentage of Average Gross Assets, Next Two Billion	0.03%
Related Party Transaction, Percentage of Average Gross Assets, Over Three Billion	0.02%
U.S. Bank N.A. and Global Fund Services [Member] | Custody, Transfer Agency, Fund Accounting and Fund Administration Services [Member]
Related Party Transaction, Minimum Annual Fee Per Fund	$ 47,000
Foreside Fund Services, LLC [Member] | Distribution Services Agreement [Member]
Related Party Transaction, Percentage of Average Daily Net Assets	0.01%
Related Party Transaction, Aggregate Annual Fee for all Funds	$ 100,000
Foreside Fund Services, LLC [Member] | Securities Activities and Service Agreement (SASA) [Member]
Related Party Transaction, Fee Per Registered Representative	5,000
Related Party Transaction, Fee Per Registered Location	1,000
Marex Capital Markets, Inc [Member] | Brokerage Commissions [Member]
Related Party Transaction, Fee Per Round Turn	11
StoneX Financial Inc [Member] | Brokerage Commissions [Member]
Related Party Transaction, Fee Per Round Turn	$ 2.5
Related Party Transaction, Minimum Percentage of Return, Monthly Commissions	16.50%
Related Party Transaction, Exchange Maintenance Margin	9.60%
StoneX Financial Inc [Member] | Brokerage Commissions [Member] | Minimum [Member]
Related Party Transaction, Fee Per Half Turn	$ 10
StoneX Financial Inc [Member] | Brokerage Commissions [Member] | Maximum [Member]
Related Party Transaction, Fee Per Half Turn	25
Phillip Capital Inc [Member] | Brokerage Commissions [Member] | Minimum [Member]
Related Party Transaction, Fee Per Half Turn	35
Phillip Capital Inc [Member] | Brokerage Commissions [Member] | Maximum [Member]
Related Party Transaction, Fee Per Half Turn	45
Wilmington Trust Company [Member]
Related Party Transaction, Annual Fee	$ 3,300