Note 10 - Marketable Securities - Net Gains and Losses on Marketable Securities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Net gains recognized during the period on marketable securities	$ 48,365	$ 24,576	$ 66,107	$ 36,926
Less: Net (gains) losses recognized on marketable securities sold during the period			(27,948)	1,507
Net unrealized gains recognized during the reporting period on marketable securities still held at the reporting date	$ 48,365	$ 24,576	$ 38,159	$ 38,433

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

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