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Note 2 - Revenue Recognition - Disaggregation of Revenues, Percentage (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Percentage of net sales	100.00%	100.00%	100.00%	100.00%
Hot Rolled Products [Member]
Percentage of net sales	29.60%	28.90%	31.00%	30.40%
Plate Products [Member]
Percentage of net sales	11.50%	10.20%	11.70%	11.70%
Cold Rolled Products [Member]
Percentage of net sales	7.10%	6.70%	5.50%	5.50%
Coated Products [Member]
Percentage of net sales	8.40%	8.60%	7.40%	8.10%
Specialty [Member]
Percentage of net sales	24.70%	25.80%	19.90%	21.90%
Tube Products [Member]
Percentage of net sales	16.60%	18.00%	21.30%	19.20%
Product and Service, Other [Member]
Percentage of net sales	2.10%	1.80%	3.20%	3.20%
Carbon Flat Products [Member]
Percentage of net sales	58.60%	56.10%	56.80%	57.10%
Carbon Flat Products [Member] | Hot Rolled Products [Member]
Percentage of net sales	29.60%	28.90%	31.00%	30.40%
Carbon Flat Products [Member] | Plate Products [Member]
Percentage of net sales	11.50%	10.20%	11.70%	11.70%
Carbon Flat Products [Member] | Cold Rolled Products [Member]
Percentage of net sales	7.10%	6.70%	5.50%	5.50%
Carbon Flat Products [Member] | Coated Products [Member]
Percentage of net sales	8.40%	8.60%	7.40%	8.10%
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	2.00%	1.70%	1.20%	1.40%
Specialty Metals Flat Products [Member]
Percentage of net sales	24.80%	25.90%	21.90%	23.70%
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	24.70%	25.80%	19.90%	21.90%
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	0.10%	0.10%	2.00%	1.80%
Tubular and Pipe Products [Member]
Percentage of net sales	16.60%	18.00%	21.30%	19.20%
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	16.60%	18.00%	21.30%	19.20%
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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