Note 18 - Segment Information - Segment Reporting Information by Capital Expenditures and Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Capital expenditures	$ 21,326	$ 19,854	$ 11,011
Assets	984,835	891,627	1,023,572
Flat Products Segment [Member]
Capital expenditures	14,306	15,299	8,797
Assets	649,744	631,607	777,074
Tubular and Pipe Products [Member]
Capital expenditures	7,020	4,555	2,214
Assets	333,677	258,412	245,962
Corporate Segment [Member]
Assets	$ 1,414	$ 1,608	$ 536