Note 9 - Marketable Securities - Summary of Investments (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Equity Securities, FV-NI, Cost	$ 587,394	$ 574,330
Equity Securities, FV-NI, Current	668,600	576,318
Equity Securities, FV-NI, Accumulated Unrealized Gain (Loss)	81,206	1,988
Debt Securities, Held to Maturity and Equity Securities, FV-NI, Cost	6,973,263	849,330
Debt Securities, Held to Maturity and Equity Securities, FV-NI, Fair Value	7,054,469	851,318
Debt Securities, Held to Maturity and Equity Securities, FV-NI, Unrealized Gain (Loss)	81,206	1,988
Certificates of Deposit [Member]
Other Short-term Investments, At Cost	948,642	275,000
Other Short-term Investments, Fair Value	948,642	$ 275,000
US Treasury Bill Securities [Member]
Other Short-term Investments, At Cost	5,437,227
Other Short-term Investments, Fair Value	$ 5,437,227