Note 2 - Significant Accounting Policies - Estimated Useful Lives of Assets (Details)	9 Months Ended
	Sep. 30, 2022
Building and Building Improvements [Member]
Estimated useful life (Year)	44 years
Building and Building Improvements [Member] | Minimum [Member]
Estimated useful life (Year)	10 years
Furniture, Fixtures and Equipment [Member]
Estimated useful life (Year)	15 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Estimated useful life (Year)	3 years