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Note 7 - Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Fair Value Disclosures [Abstract]    
Asset Impairment Charges $ 4,130us-gaap_AssetImpairmentCharges $ 0us-gaap_AssetImpairmentCharges