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Note 15 - Segment Information (Details Textual) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2015 USD ($) | Jun. 30, 2015 USD ($) | Dec. 31, 2014 USD ($) | Jun. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Carbon Flat Products and Specialty Metals Flat Products [Member] |  |  |  |  |  |  |  |  |
Number of Reportable Segments |  |  |  |  | 2 |  |  |  |
Tubular And Pipe Products [Member] |  |  |  |  |  |  |  |  |
Goodwill and Intangible Asset Impairment |  |  |  |  | $ 24,451,000 |  |  |  |
Goodwill, Impairment Loss |  | $ 16,451,000 | $ 23,836,000 | $ 16,500,000 | 16,451,000 |  | $ 23,836,000 |  |
Specialty Metal Flat Products [Member] |  |  |  |  |  |  |  |  |
Goodwill, Impairment Loss | $ 500,000 |  |  |  | $ 500,000 |  |  |  |
Number of Reportable Segments |  |  |  |  | 3 |  |  |  |
Goodwill and Intangible Asset Impairment |  |  |  |  | $ 24,951,000 | [1] | 23,836,000 | [1] | $ 0
Goodwill, Impairment Loss |  |  |  |  | $ 16,951,000 |  | $ 23,836,000 |  |
[1] | $24,451 of the goodwill and intangible asset impairment in 2015 related to the tubular and pipe products segment, $500 related to the specialty metals flat products segment. The goodwill impairment in 2014 related to the tubular and pipe products segment.

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