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Note 2 - Revenue Recognition - Disaggregation of Revenues, Percentage (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Hot Rolled Products [Member]
Percentage of net sales	31.90%	27.30%	30.10%	29.30%
Plate Products [Member]
Percentage of net sales	11.20%	9.20%	10.60%	10.90%
Cold Rolled Products [Member]
Percentage of net sales	7.80%	6.30%	7.10%	5.80%
Coated Products [Member]
Percentage of net sales	7.80%	12.30%	8.30%	9.50%
Specialty [Member]
Percentage of net sales	23.30%	24.80%	24.00%	22.80%
Tube Products [Member]
Percentage of net sales	14.90%	17.00%	16.70%	18.50%
Product and Service, Other [Member]
Percentage of net sales	3.10%	3.10%	3.20%	3.20%
Carbon Flat Products [Member]
Percentage of net sales	60.50%	56.00%	57.90%	56.70%
Carbon Flat Products [Member] | Hot Rolled Products [Member]
Percentage of net sales	31.90%	27.30%	30.10%	29.30%
Carbon Flat Products [Member] | Plate Products [Member]
Percentage of net sales	11.20%	9.20%	10.60%	10.90%
Carbon Flat Products [Member] | Cold Rolled Products [Member]
Percentage of net sales	7.80%	6.30%	7.10%	5.80%
Carbon Flat Products [Member] | Coated Products [Member]
Percentage of net sales	7.80%	12.30%	8.30%	9.50%
Carbon Flat Products [Member] | Specialty [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Carbon Flat Products [Member] | Tube Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Carbon Flat Products [Member] | Product and Service, Other [Member]
Percentage of net sales	1.80%	0.90%	1.80%	1.20%
Specialty Metals Flat Products [Member]
Percentage of net sales	24.60%	27.00%	25.40%	24.80%
Specialty Metals Flat Products [Member] | Hot Rolled Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Specialty Metals Flat Products [Member] | Plate Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Specialty Metals Flat Products [Member] | Cold Rolled Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Specialty Metals Flat Products [Member] | Coated Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Specialty Metals Flat Products [Member] | Specialty [Member]
Percentage of net sales	23.30%	24.80%	24.00%	22.80%
Specialty Metals Flat Products [Member] | Tube Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Specialty Metals Flat Products [Member] | Product and Service, Other [Member]
Percentage of net sales	1.30%	2.20%	1.40%	2.00%
Tubular and Pipe Products [Member]
Percentage of net sales	14.90%	17.00%	16.70%	18.50%
Tubular and Pipe Products [Member] | Hot Rolled Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Tubular and Pipe Products [Member] | Plate Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Tubular and Pipe Products [Member] | Cold Rolled Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Tubular and Pipe Products [Member] | Coated Products [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Tubular and Pipe Products [Member] | Specialty [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%
Tubular and Pipe Products [Member] | Tube Products [Member]
Percentage of net sales	14.90%	17.00%	16.70%	18.50%
Tubular and Pipe Products [Member] | Product and Service, Other [Member]
Percentage of net sales	0.00%	0.00%	0.00%	0.00%

X

- Definition

Percentage of revenue, including tax collected from customer, from satisfaction of performance obligation by transferring promised good or service to customer.

+ References

No definition available.

+ Details

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