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Note 7 - Goodwill and Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Goodwill [Table Text Block]
(in thousands)
  
Carbon Flat
Products
    
Specialty Metals
Flat Products
    
Tubular and
Pipe Products
    
Total
  
                                 
Balance as of December 31, 2017
   $
-
     $
-
     $
-
     $
-
  
Acquisitions
    
-
      
2,358
      
-
      
2,358
  
Impairments
    
-
      
-
      
-
      
-
  
Balance as of December 31, 2018
   $
-
     $
2,358
     $
-
     $
2,358
  
Schedule of Finite and Indefinite Lived Intangible Assets [Table Text Block]
   
As of December 31, 2018
  
(in thousands)
  
Gross Carrying
Amount
    
Acquisitions
    
Accumulated
Amortization
    
Intangible Assets,
Net
  
                                 
Customer relationships - subject to amortization
   $
13,332
     $
640
     $
(6,698
 )   $
7,274
  
Covenant not to compete - subject to amortization
    
-
      
157
      
(42
 )    
115
  
Trade names - not subject to amortization
    
15,425
      
2,100
      
-
      
17,525
  
    $
28,757
     $
2,897
     $
(6,740
 )   $
24,914
  
   
As of December 31, 2017
  
(in thousands)
  
Gross Carrying
Amount
    
Acquisitions
    
Accumulated
Amortization
    
Intangible Assets,
Net
  
                                 
Customer relationships - subject to amortization
   $
13,332
     $
-
     $
(5,777
 )   $
7,555
  
Trade names - not subject to amortization
    
15,425
      
-
      
-
      
15,425
  
    $
28,757
     $
-
     $
(5,777
 )   $
22,980