Note 15 - Segment Information - Segment Reporting Information by Capital Expenditures and Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Capital expenditures	$ 10,022	$ 4,579
Assets	1,086,116		$ 1,023,572	$ 1,023,572
Flat Products Segment [Member]
Capital expenditures	8,236	3,496
Assets	828,286			777,074
Tubular and Pipe Products [Member]
Capital expenditures	1,786	1,083
Assets	257,402			245,962
Corporate Segment [Member]
Capital expenditures	0	$ 0
Assets	$ 428			$ 536