Note 3 - Summary of Significant Accounting Policies (Details Textual)	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) shares	Sep. 30, 2023 shares	Sep. 30, 2024 USD ($) shares	Sep. 30, 2023 shares	Dec. 31, 2023 USD ($)
Payments to Acquire Additional Interest in Subsidiaries			$ 205,000
Number of Operating Segments			2
Cash, Uninsured Amount	$ 4,100,000		$ 4,100,000
Marketable Securities, Current	0		0		$ 2,976,573
Accounts Receivable, Allowance for Credit Loss	$ 10,000		$ 10,000		10,000
Weighted Average Number of Shares Outstanding, Basic (in shares) | shares	79,966,833	73,730,921	80,165,181	72,374,693
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares			3,684,697	3,930,654
Marketable Securities					2,976,573
US Treasury Securities [Member]
Marketable Securities, Current					3,000,000
Money Market Funds [Member]
Cash Equivalents, at Carrying Value	$ 4,800,000		$ 4,800,000		$ 3,000,000