Note 4 - Fair Value Measurements - Assets and Liabilities Measured On Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Commodity price derivatives – current	$ 17,323	$ 7,582
Commodity price derivatives – noncurrent	1,813	0
Commodity price derivatives – current	1,364	5,380
Commodity price derivatives – noncurrent	1,392	0
Commodity Contract [Member]
Total recurring fair value measurements, net	16,380
Commodity Contract [Member] | Fair Value, Recurring [Member]
Commodity price derivatives – current	17,323	7,582
Commodity price derivatives – noncurrent	1,813
Commodity price derivatives – current	1,364	5,380
Total assets	19,136
Total recurring fair value measurements, net	16,380	2,202
Commodity price derivatives – noncurrent	1,392
Total liabilities	2,756
Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Commodity price derivatives – current	0	0
Commodity price derivatives – noncurrent	0
Commodity price derivatives – current	0	0
Total assets	0
Total recurring fair value measurements, net	0	0
Commodity price derivatives – noncurrent	0
Total liabilities	0
Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Commodity price derivatives – current	17,323	7,582
Commodity price derivatives – noncurrent	1,813
Commodity price derivatives – current	1,364	5,380
Total assets	19,136
Total recurring fair value measurements, net	16,380	2,202
Commodity price derivatives – noncurrent	1,392
Total liabilities	2,756
Commodity Contract [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Commodity price derivatives – current	0	0
Commodity price derivatives – noncurrent	0
Commodity price derivatives – current	0	0
Total assets	0
Total recurring fair value measurements, net	0	$ 0
Commodity price derivatives – noncurrent	0
Total liabilities	$ 0