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Note 1 - Summary of Significant Accounting Policies - Estimated Useful Lives of Property, Plant, and Equipment (Details)
12 Months Ended
Dec. 31, 2018
Leasehold Improvements [Member]  
Leasehold improvements Shorter of estimated useful life or remaining lease term
Building and Building Improvements [Member] | Minimum [Member]  
Property, plant, and equipment, useful life (Year) 20 years
Building and Building Improvements [Member] | Maximum [Member]  
Property, plant, and equipment, useful life (Year) 40 years
Machinery and Equipment [Member] | Minimum [Member]  
Property, plant, and equipment, useful life (Year) 7 years
Machinery and Equipment [Member] | Maximum [Member]  
Property, plant, and equipment, useful life (Year) 15 years
Furniture, Fixtures, and Computers [Member] | Minimum [Member]  
Property, plant, and equipment, useful life (Year) 3 years
Furniture, Fixtures, and Computers [Member] | Maximum [Member]  
Property, plant, and equipment, useful life (Year) 7 years