Note 18 - Segment Information - Segment Reporting Information by Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net sales	$ 2,559,990	$ 2,312,253	$ 1,234,144
Depreciation and amortization	19,738	20,316	19,490
Operating income (loss)	133,747	172,466	573
Other loss, net	45	36	73
Income before interest and income taxes	133,702	172,430	500
Interest and other expense on debt	10,080	7,631	7,411
Income (loss) before income taxes	123,622	164,799	(6,911)
Specialty Metals Flat Products [Member]
Net sales	776,022	585,751	313,190
Depreciation and amortization	4,060	3,692	1,951
Operating income (loss)	93,662	70,544	11,666
Carbon Flat Products [Member]
Net sales	1,356,605	1,344,150	690,273
Depreciation and amortization	10,695	11,286	11,941
Operating income (loss)	25,015	110,074	(10,289)
Tubular and Pipe Products [Member]
Net sales	427,363	382,352	230,681
Depreciation and amortization	4,913	5,267	5,478
Operating income (loss)	34,856	7,353	9,019
Corporate Segment [Member]
Depreciation and amortization	70	71	120
Operating income (loss)	$ (19,786)	$ (15,505)	$ (9,823)