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Note 15 - Segment Information - Segment Reporting Information by Capital Expenditures and Assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Capital expenditures $ 2,286 $ 4,235  
Assets 738,359   $ 640,605
Flat Products Segment [Member]      
Capital expenditures 1,561 3,981  
Assets 495,002   404,269
Tubular and Pipe Products [Member]      
Capital expenditures 725 254  
Assets 242,607   235,516
Corporate Segment [Member]      
Capital expenditures 0 $ 0  
Assets $ 750   $ 820