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Note 2 - Summary of Significant Accounting Policies - Property, Plant, and Equipment, Useful Lives (Details)	12 Months Ended
	Dec. 31, 2021
Furniture and Fixtures [Member] \| Minimum [Member]
Property useful lives (Year)	5 years
Furniture and Fixtures [Member] \| Maximum [Member]
Property useful lives (Year)	10 years
Automobiles [Member] \| Minimum [Member]
Property useful lives (Year)	5 years
Automobiles [Member] \| Maximum [Member]
Property useful lives (Year)	8 years