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Fair value of investment in security owned.

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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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Note 4 - Equity Method Investment (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Aug. 13, 2026	Feb. 03, 2026	Dec. 31, 2025
Share Price (in dollars per share)	$ 1.07		$ 1.07			$ 1.25
Management Fee Income	$ 3,150,000	$ 3,150,000	$ 6,300,000	$ 6,300,000
Lucid Diagnostics [Member] \| Monthly Services Agreement [Member]
Management Fee, Monthly	1,050,000		1,050,000
Management Fee Income	$ 3,150,000	3,150,000	$ 6,300	6,300
Lucid Diagnostics [Member]
Share Price (in dollars per share)	$ 1.07		$ 1.07				$ 1.09
Lucid Diagnostics [Member]
Investment Owned, Fair Value	$ 33,500,000		$ 33,500,000				$ 34,100,000
Equity Securities, FV-NI, Gain (Loss)	$ (2,504)	$ 10,643	$ (626)	$ (10,361)
Equity Method Investment, Ownership Percentage	25.10%		25.10%				27.50%
Lucid Diagnostics [Member] \| Subsequent Event [Member]
Equity Method Investment, Ownership Percentage					25.10%