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Note 9 - Marketable Securities - Net Gains and Losses on Marketable Securities (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Net (losses) gains recognized during the period on marketable securities	$ 47,223	$ (14,357)	$ 79,218	$ 65,823
Less: Net losses recognized during the period on marketable securities sold during the period	0	0	0	(433,769)
Unrealized (losses) gains recognized during the reporting period on marketable securities still held at the reporting date	$ 47,223	$ (14,357)	$ 79,218	$ 499,592

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

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