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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, 2022
Mar. 31, 2021
Dec. 31, 2021
Sep. 30, 2021
Dec. 31, 2020
Capital expenditures $ 2,116 $ 2,286      
Assets 1,043,703   $ 1,023,572 $ 1,043,703 $ 1,023,572
Flat Products Segment [Member]          
Capital expenditures 2,023 1,561      
Assets       788,202 777,074
Tubular and Pipe Products [Member]          
Capital expenditures 93 725      
Assets       255,037 245,962
Corporate Segment [Member]          
Capital expenditures $ 0 $ 0      
Assets       $ 464 $ 536