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Note 10 - Property, Plant and Equipment (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Depreciation $ 5,199,000 $ 6,945,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 69,473,000 121,040,000
Building and Building Improvements [Member]    
Capital Leased Assets, Gross 2,853,000 $ 0
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment $ 238,000