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Note 7 - Fair Value Measurements, Recorded (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Metals Swap [Member]    
Assets    
Metals swaps  
Liabilities    
Metals swaps  
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Chicago Tube and Iron Company Acquisition [Member] | Interest Rate Swap [Member]    
Liabilities    
Interest rate swap (CTI)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | A B L Credit Facility [Member] | Fixed Interest Rate Swap [Member]    
Liabilities    
Interest rate swap (CTI)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Assets    
Total assets at fair value
Embedded customer derivative  
Liabilities    
Embedded customer derivative  
Total liabilities recorded at fair value
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Metals Swap [Member]    
Assets    
Metals swaps $ 876  
Liabilities    
Metals swaps   $ 487
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Chicago Tube and Iron Company Acquisition [Member] | Interest Rate Swap [Member]    
Liabilities    
Interest rate swap (CTI) 128 178
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | A B L Credit Facility [Member] | Fixed Interest Rate Swap [Member]    
Liabilities    
Interest rate swap (CTI) 213 386
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Assets    
Total assets at fair value 876 487
Embedded customer derivative   487
Liabilities    
Embedded customer derivative 876  
Total liabilities recorded at fair value $ 1,217 $ 1,051
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Metals Swap [Member]    
Assets    
Metals swaps  
Liabilities    
Metals swaps  
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Chicago Tube and Iron Company Acquisition [Member] | Interest Rate Swap [Member]    
Liabilities    
Interest rate swap (CTI)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | A B L Credit Facility [Member] | Fixed Interest Rate Swap [Member]    
Liabilities    
Interest rate swap (CTI)
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Assets    
Total assets at fair value
Embedded customer derivative  
Liabilities    
Embedded customer derivative  
Total liabilities recorded at fair value
Metals Swap [Member]    
Assets    
Metals swaps $ 876  
Liabilities    
Metals swaps   $ 487
Chicago Tube and Iron Company Acquisition [Member] | Interest Rate Swap [Member]    
Liabilities    
Interest rate swap (CTI) 128 178
A B L Credit Facility [Member] | Fixed Interest Rate Swap [Member]    
Liabilities    
Interest rate swap (CTI) 213 386
Total assets at fair value 876 487
Embedded customer derivative   487
Embedded customer derivative 876  
Total liabilities recorded at fair value $ 1,217 $ 1,051