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Note 2 - Accounts Receivable (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Receivables [Abstract]    
Allowance for Doubtful Accounts Receivable, Current $ 2.9us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 2.9us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent