Note 2 - Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Total operating revenues		$ 200,400		$ 275,266		$ 457,848	$ 563,030
Lease operating expenses		33,726		32,798		69,288	63,069
Production and ad valorem taxes		12,391		16,596		27,543	30,998
Depletion, depreciation and amortization		101,226		127,693		210,551	258,543
Income Tax Expense (Benefit)		7,663		14,250		17,602	16,547
Net income		26,176	$ 36,335	29,717	$ 6,438	62,511	36,155
Total assets		3,089,453				3,089,453		$ 3,063,288
Operating Segments [Member]
Total operating revenues		200,400		275,266		457,848	563,030
Lease operating expenses		29,014		29,998		60,613	58,509
Production and ad valorem taxes		12,391		16,596		27,543	30,998
Expensed workover costs		4,712		2,800		8,675	4,560
Total significant expenses		46,117		49,394		96,831	94,067
Depletion, depreciation and amortization		101,226		127,693		210,551	258,543
General and administrative expenses, including stock-based comp		5,759		8,510		12,281	16,993
Interest expense, net		36,051		40,591		72,229	81,833
Income Tax Expense (Benefit)		7,663		14,250		17,602	16,547
Other segment items	[1]	(22,592)		5,111		(14,157)	58,892
Total expenses		174,224		245,549		395,337	526,875
Net income		26,176		29,717		62,511	36,155
Total assets		3,089,453		3,056,457		3,089,453	3,056,457
Capital costs incurred, including acquisitions		$ 126,507		$ 169,426		$ 308,839	$ 319,496

[1] Other segment items included in segment net income are exploration and abandonment expense, accretion of discount, other expense and gains and losses on derivative instruments.