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Note 8 - Property, Plant and Equipment (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Property, Plant and Equipment [Abstract]    
Depreciation $ 10,409,000us-gaap_Depreciation $ 12,371,000us-gaap_Depreciation
Capital Expenditures Incurred but Not yet Paid $ 52,000us-gaap_CapitalExpendituresIncurredButNotYetPaid $ 135,000us-gaap_CapitalExpendituresIncurredButNotYetPaid