Note 2 - Significant Accounting Policies - Estimated Useful Lives of Assets (Details)	Sep. 30, 2023
Building and Building Improvements [Member] | Minimum [Member]
Building and improvements (in years) (Year)	10 years
Building and Building Improvements [Member] | Maximum [Member]
Building and improvements (in years) (Year)	44 years
Furniture, Fixtures and Equipment [Member] | Minimum [Member]
Building and improvements (in years) (Year)	3 years
Furniture, Fixtures and Equipment [Member] | Maximum [Member]
Building and improvements (in years) (Year)	15 years