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Note 2 - Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Estimated Useful Lives for Each Asset Group [Table Text Block]
Buildings and improvements (in years)
    
20
to
30
or term of lease if applicable
  
Machinery and equipment (in years)
    
7
to
15
 
  
Furniture and fixtures (in years)
    
5
to
7
 
  
Computer hardware and software (in years)
    
3
to
7