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Note 7 - Fair Value of Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Industrial Revenue Bond [Member]
   
Note 7 - Fair Value of Financial Instruments (Details) [Line Items]    
Long-term Debt, Fair Value $ 3.5 $ 4.3
Term Loan [Member]
   
Note 7 - Fair Value of Financial Instruments (Details) [Line Items]    
Long-term Debt, Fair Value   48.9
Revolving Credit Facility [Member]
   
Note 7 - Fair Value of Financial Instruments (Details) [Line Items]    
Long-term Debt, Fair Value $ 233.8 $ 146.1