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Note 3 - Investments (Details Textual) - USD ($)								1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
Note 3 - Investments (Details Textual) - USD ($)	Nov. 14, 2025	May 03, 2024	Jan. 03, 2024	Jun. 16, 2022	Jun. 10, 2022	Mar. 17, 2021	Mar. 30, 2012	Jul. 31, 2023	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt and Equity Securities, Realized Gain (Loss)									$ 0	$ 0	$ 0	$ 0
TangoMe, Inc. [Member]
Investment Owned, Shares Sold During Period, Shares			15,448
Investment Owned, Shares Sold, Price Per Share			$ 2.89
Proceeds from Sale of Equity Securities, FV-NI			$ 44,721
Debt and Equity Securities, Realized Gain (Loss)			11,663
Investment Owned, Return of Capital			$ 33,058
Dividend Income, Operating	$ 116,500	$ 75,687
TangoMe, Inc, Series A Preferred Stock [Member]
Investment Owned, at Fair Value														$ 3,061,838	$ 4,303,369
Investment Owned, Increase (Decrease) in Fair Value														1,241,118
TangoMe, Inc, Series A Preferred Stock [Member] \| Chief Executive Officer [Member]
Investment Purchased, Shares							468,121
Investment Purchased, Price Per Share							$ 2.14
Investment Purchased, Value							$ 1,000,000
Common Shares of Buoy Health, Inc [Member]
Investment Purchased, Shares						11,233
Investment Purchased, Price Per Share						$ 15.92		$ 15.85					$ 0.05
Investment Owned, at Fair Value						$ 178,824								178,043	160,938
Investment Owned, Increase (Decrease) in Fair Value													$ (177,481)	$ 17,101	(17,882)
Preferred Stock in Aristotle [Member]
Investment Purchased, Shares				5,037	5,037
Investment Purchased, Price Per Share				$ 19.85	$ 19.85
Investment Purchased, Value				$ 100,000
Investment Owned, at Fair Value					$ 100,000										$ 200,000
Preferred Stock in Aristotle [Member] \| Chief Executive Officer [Member]
Investment Purchased, Shares					5,037
Investment Purchased, Price Per Share					$ 19.85