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Note 16 - Segment Information - Segment Reporting Information by Capital Expenditures (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Capital expenditures $ 4,421 $ 13,775  
Assets 724,405   $ 760,740
Flat Products Segment [Member]      
Capital expenditures 3,281 10,309  
Assets 509,068   560,116
Tubular and Pipe Products [Member]      
Capital expenditures 1,140 3,093  
Assets 214,004   200,016
Corporate Segment [Member]      
Capital expenditures $ 373  
Assets $ 1,333   $ 608