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Note 4 - Goodwill and Intangible Assets (Details Textual) - USD ($)
 6 Months Ended 9 Months Ended
Jun. 30, 2015
Sep. 30, 2015
Dec. 31, 2014
Trade Names [Member]      
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)   $ 8,000,000  
Specialty Metal Flat Products [Member]      
Goodwill   500,000  
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year   $ 889,000  
Percentage of Decrease in Price of Hot Rolled Carbon Steel   22.00%  
Amount Decrease Per Ton in Price of Hot Rolled Carbon Steel   $ 130  
Goodwill, Impairment Loss $ 16,500,000 16,451,000  
Goodwill   500,000 $ 16,951,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two   889,000  
Finite-Lived Intangible Assets, Amortization Expense, Year Three   889,000  
Finite-Lived Intangible Assets, Amortization Expense, Year Four   889,000  
Finite-Lived Intangible Assets, Amortization Expense, Year Five   $ 889,000