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Note 2 - Revenue Recognition - Disaggregation of Revenues, Percentage (Details) | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Percentage of net sales | 100.00% | 100.00%
Specialty Metals Flat Products [Member] |  |
Percentage of net sales | 24.60% | 29.10%
Carbon Flat Products [Member] |  |
Percentage of net sales | 57.10% | 54.00%
Tubular and Pipe Products [Member] |  |
Percentage of net sales | 18.30% | 16.90%
Specialty [Member] |  |
Percentage of net sales | 24.60% | 29.10%
Specialty [Member] | Specialty Metals Flat Products [Member] |  |
Percentage of net sales | 24.60% | 29.10%
Specialty [Member] | Carbon Flat Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Specialty [Member] | Tubular and Pipe Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Hot Rolled Products [Member] |  |
Percentage of net sales | 27.70% | 27.30%
Hot Rolled Products [Member] | Specialty Metals Flat Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Hot Rolled Products [Member] | Carbon Flat Products [Member] |  |
Percentage of net sales | 27.70% | 27.30%
Hot Rolled Products [Member] | Tubular and Pipe Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Tube Products [Member] |  |
Percentage of net sales | 18.30% | 16.90%
Tube Products [Member] | Specialty Metals Flat Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Tube Products [Member] | Carbon Flat Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Tube Products [Member] | Tubular and Pipe Products [Member] |  |
Percentage of net sales | 18.30% | 16.90%
Plate Products [Member] |  |
Percentage of net sales | 13.50% | 13.50%
Plate Products [Member] | Specialty Metals Flat Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Plate Products [Member] | Carbon Flat Products [Member] |  |
Percentage of net sales | 13.50% | 13.50%
Plate Products [Member] | Tubular and Pipe Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Coated Products [Member] |  |
Percentage of net sales | 11.10% | 8.50%
Coated Products [Member] | Specialty Metals Flat Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Coated Products [Member] | Carbon Flat Products [Member] |  |
Percentage of net sales | 11.10% | 8.50%
Coated Products [Member] | Tubular and Pipe Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Cold Rolled Products [Member] |  |
Percentage of net sales | 4.20% | 3.40%
Cold Rolled Products [Member] | Specialty Metals Flat Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Cold Rolled Products [Member] | Carbon Flat Products [Member] |  |
Percentage of net sales | 4.20% | 3.40%
Cold Rolled Products [Member] | Tubular and Pipe Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Product and Service, Other [Member] |  |
Percentage of net sales | 0.60% | 1.30%
Product and Service, Other [Member] | Specialty Metals Flat Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%
Product and Service, Other [Member] | Carbon Flat Products [Member] |  |
Percentage of net sales | 0.60% | 1.30%
Product and Service, Other [Member] | Tubular and Pipe Products [Member] |  |
Percentage of net sales | 0.00% | 0.00%

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