Note 5 - Operating Segments - Reconciliation of Segment Revenues, Income Before Income Taxes, and Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues	$ 13,637,972	$ 9,225,542
Reportable Legal Entities [Member]
Revenues	13,946,000	9,322,000
Intersegment Eliminations [Member]
Revenues	$ 308,000	$ 96,000