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Note 9 - Fair Value of Assets and Liabilities - Fair Value Measurements, Recorded (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Total assets at fair value $ 3,444 $ 2,286
Total liabilities recorded at fair value 4,612 4,839
Metal Swaps [Member]    
Derivative asset 3,444 2,286
Embedded Customer Derivatives [Member]    
Derivative liability 3,996 2,178
Interest Rate Swap [Member]    
Derivative liability 616 2,661
Fair Value, Inputs, Level 1 [Member]    
Total assets at fair value 0 0
Total liabilities recorded at fair value 0 0
Fair Value, Inputs, Level 1 [Member] | Metal Swaps [Member]    
Derivative asset 0 0
Fair Value, Inputs, Level 1 [Member] | Embedded Customer Derivatives [Member]    
Derivative liability 0 0
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]    
Derivative liability 0
Fair Value, Inputs, Level 2 [Member]    
Total assets at fair value 3,444 2,286
Total liabilities recorded at fair value 4,612 4,839
Fair Value, Inputs, Level 2 [Member] | Metal Swaps [Member]    
Derivative asset 3,444 2,286
Fair Value, Inputs, Level 2 [Member] | Embedded Customer Derivatives [Member]    
Derivative liability 3,996 2,178
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]    
Derivative liability 616 2,661
Fair Value, Inputs, Level 3 [Member]    
Total assets at fair value 0 0
Total liabilities recorded at fair value 0 0
Fair Value, Inputs, Level 3 [Member] | Metal Swaps [Member]    
Derivative asset 0 0
Fair Value, Inputs, Level 3 [Member] | Embedded Customer Derivatives [Member]    
Derivative liability 0 0
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]    
Derivative liability $ 0