Note 5 - Investment in Equity Securities (Details Textual)	Feb. 24, 2025 USD ($) $ / shares shares
Investment in Blue Fysh Holdings Inc. [Member]
Investment Owned Percentage Ownership Acquired	10.00%
Investment in Blue Fysh Holdings Inc. [Member] \| Series N Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)	483,000
Shares Issued, Price Per Share (in dollars per share) \| $ / shares	$ 5
Stock Issued During Period, Value, New Issues \| $	$ 2,415,000
Blue Fysh Common Stock [Member]
Investment Owned Shares Exchanged (in shares)	82

Number of new stock issued during the period.

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+ Details

- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

+ References

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