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Note 12 - Fair Value of Assets and Liabilities - Fair Value Measurements, Recorded (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Total assets at fair value $ 2,286  
Total liabilities recorded at fair value 4,839 $ 5,620
Metal Swaps [Member]    
Derivative asset 2,286  
Derivative Liability, Total 2,178  
Interest Rate Swap [Member]    
Derivative Liability, Total 2,661 5,620
Fair Value, Inputs, Level 1 [Member]    
Total assets at fair value 0  
Total liabilities recorded at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Metal Swaps [Member]    
Derivative asset 0  
Derivative Liability, Total 0  
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]    
Derivative Liability, Total 0 0
Fair Value, Inputs, Level 2 [Member]    
Total assets at fair value 2,286  
Total liabilities recorded at fair value 4,839 5,620
Fair Value, Inputs, Level 2 [Member] | Metal Swaps [Member]    
Derivative asset 2,286  
Derivative Liability, Total 2,178  
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]    
Derivative Liability, Total 2,661 5,620
Fair Value, Inputs, Level 3 [Member]    
Total assets at fair value 0  
Total liabilities recorded at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Metal Swaps [Member]    
Derivative asset 0  
Derivative Liability, Total 0  
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]    
Derivative Liability, Total $ 0 $ 0