Note 2 - Summary of Significant Accounting Policies - Property, Plant and Equipment Useful Lives (Details)	12 Months Ended
	Dec. 31, 2019
Other Capitalized Property Plant and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment Useful Lives (Year)	10 years
Other Capitalized Property Plant and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment Useful Lives (Year)	25 years
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment Useful Lives (Year)	3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment Useful Lives (Year)	5 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment Useful Lives (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment Useful Lives (Year)	10 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment Useful Lives (Year)	10 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment Useful Lives (Year)	20 years
Software and Software Development Costs [Member] | Minimum [Member]
Property, Plant and Equipment Useful Lives (Year)	3 years
Software and Software Development Costs [Member] | Maximum [Member]
Property, Plant and Equipment Useful Lives (Year)	7 years
Right-of-use Assets [Member] | Minimum [Member]
Property, Plant and Equipment Useful Lives (Year)	1 year
Right-of-use Assets [Member] | Maximum [Member]
Property, Plant and Equipment Useful Lives (Year)	15 years