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Note 11 - Fair Value of Assets and Liabilities (Details) - Fair Value Measurements, Recorded (Fair Value, Measurements, Recurring [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Assets:    
Embedded customer derivatives $ 614 $ 113
Total assets at fair value 614 113
Liabilities:    
Total liabilities at fair value 1,600 1,555
Nickel Swaps [Member] | Fair Value, Inputs, Level 2 [Member]
    
Liabilities:    
Nickel swaps 614 168
Nickel Swaps [Member]
    
Liabilities:    
Nickel swaps 614 168
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
    
Liabilities:    
Interest rate swap 279 446
Interest Rate Swap [Member]
    
Liabilities:    
Interest rate swap 279 446
Fixed Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
    
Liabilities:    
Interest rate swap 710 941
Fixed Interest Rate Swap [Member]
    
Liabilities:    
Interest rate swap 710 941
Fair Value, Inputs, Level 2 [Member]
    
Assets:    
Embedded customer derivatives 614 113
Total assets at fair value 614 113
Liabilities:    
Total liabilities at fair value $ 1,603 $ 1,555