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Note 16 - Segment Information - Segment Reporting Information by Capital Expenditures and Assets (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Capital expenditures $ 6,183 $ 4,421  
Assets 643,135   $ 649,555
Flat Products Segment [Member]      
Capital expenditures 5,628 3,281  
Assets 422,104   432,566
Tubular and Pipe Products [Member]      
Capital expenditures 555 1,140  
Assets 220,070   215,841
Corporate Segment [Member]      
Capital expenditures 0 $ 0  
Assets $ 961   $ 1,148