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Note 4 - Fair Value Measurements - Assets and Liabilities Measured On Recurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Commodity price derivatives – current $ 2,639 $ 31,480
Commodity price derivatives – noncurrent 1,380 16,059
Derivative instruments 16,440 13,054
Derivative instruments 1,054 65
Commodity Contract [Member]    
Total recurring fair value measurements 13,475  
Commodity Contract [Member] | Fair Value, Recurring [Member]    
Commodity price derivatives – current 2,639 31,480
Commodity price derivatives – noncurrent 1,380 16,059
Total assets 4,019 47,539
Derivative instruments 16,440 13,054
Derivative instruments 1,054 65
Total liabilities 17,494 13,119
Total recurring fair value measurements (13,475) 34,420
Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Commodity price derivatives – current 0 0
Commodity price derivatives – noncurrent 0 0
Total assets 0 0
Derivative instruments 0 0
Derivative instruments 0 0
Total liabilities 0 0
Total recurring fair value measurements 0 0
Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Commodity price derivatives – current 2,639 31,480
Commodity price derivatives – noncurrent 1,380 16,059
Total assets 4,019 47,539
Derivative instruments 16,440 13,054
Derivative instruments 1,054 65
Total liabilities 17,494 13,119
Total recurring fair value measurements (13,475) 34,420
Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Commodity price derivatives – current 0 0
Commodity price derivatives – noncurrent 0 0
Total assets 0 0
Derivative instruments 0 0
Derivative instruments 0 0
Total liabilities 0 0
Total recurring fair value measurements $ 0 $ 0