Note 2 - Summary of Significant Accounting Policies - Property, Plant and Equipment Useful Lives (Details)	12 Months Ended
	Dec. 31, 2020
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)	40 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment Useful Lives (Year)	3 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment Useful Lives (Year)	20 years
Tools, Dies and Molds [Member]
Property, Plant and Equipment Useful Lives (Year)	3 years