Note 8 - Goodwill and Intangible Assets - Goodwill, by Reportable Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Balance	$ 10,496	$ 10,496
Acquisitions	41,595	0
Impairments	0	0
Balance	52,091	10,496
Carbon Flat Products [Member]
Balance	1,065	1,065
Acquisitions	33,194	0
Impairments	0	0
Balance	34,259	1,065
Specialty Metals Flat Products [Member]
Balance	9,431	9,431
Acquisitions	0	0
Impairments	0	0
Balance	9,431	9,431
Tubular and Pipe Products [Member]
Balance	0	0
Acquisitions	8,401	0
Impairments	0	0
Balance	$ 8,401	$ 0