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Note 9 - Marketable Securities - Net Gains and Losses on Marketable Securities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Net (losses) gains recognized during the period on marketable securities	$ (9,501)	$ 7,479	$ 31,995	$ 80,180
Less: Net losses recognized during the period on marketable securities sold during the period	0	(433,769)	0	(433,769)
Unrealized (losses) gains recognized during the reporting period on marketable securities still held at the reporting date	$ (9,501)	$ 441,248	$ 31,995	$ 513,949

Amount of realized gain (loss) on investment in debt and equity securities.

Amount of unrealized gain (loss) on investment in debt and equity securities.