Note 2 - Summary of Significant Accounting Policies - Property, Plant and Equipment Useful Life (Details)	12 Months Ended
	Dec. 31, 2019
Building and Building Improvements [Member] | Minimum [Member]
Buildings and improvements (Year)	5 years
Building and Building Improvements [Member] | Maximum [Member]
Buildings and improvements (Year)	40 years
Furniture and Fixtures [Member] | Minimum [Member]
Buildings and improvements (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Buildings and improvements (Year)	20 years
Leasehold Improvements [Member] | Minimum [Member]
Buildings and improvements (Year)	3 years
Leasehold Improvements [Member] | Maximum [Member]
Buildings and improvements (Year)	35 years