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Note 16 - Segment Information - Segment Reporting Information by Capital Expenditures and Assets (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Capital expenditures $ 19,564 $ 13,963  
Assets 992,806   $ 891,627
Flat Products Segment [Member]      
Capital expenditures 12,711 11,063  
Assets 708,766   631,607
Tubular and Pipe Products [Member]      
Capital expenditures 6,593 2,900  
Assets 282,300   258,412
Corporate Segment [Member]      
Capital expenditures 260 $ 0  
Assets $ 1,740   $ 1,608