Note 1 - Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2019
Building [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	20 years
Building [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	40 years
Building Improvements [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	5 years
Building Improvements [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	40 years
Machinery, Equipment and Fixtures [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	3 years
Machinery, Equipment and Fixtures [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	10 years
Transportation Equipment [Member] | Minimum [Member]
Property, plant and equipment, useful life (Year)	3 years
Transportation Equipment [Member] | Maximum [Member]
Property, plant and equipment, useful life (Year)	5 years