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Note 1 - Summary of Operations and Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Property, Plant and Equipment, Estimated Useful Life [Table Text Block]
Buildings
   
10
20
 
Machinery and Equipment
   
5
10
 
Furniture and Fixtures
   
3
10
 
Computer Hardware and Software
   
3
5
 
Leasehold Improvements
   
Lesser of useful life or lease term