Note 15 - Supplemental Disclosures of Cash Flow Information - Supplemental Disclosures of Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash paid for interest	$ 806	$ 500
Change in capital expenditure accruals	(277)	196
Change in accrual for acquisition costs	0	(546)
Assumption of commodity derivative liability in acquisition of properties	0	3,152
Assumption of debt in acquisition of properties	0	3,347
Suspense accounts assumed	169	1,826
Deferred tax liability from acquisition	0	2,819
Addition of operating lease liability and right of use asset	0	953
Asset retirement obligations assumed	1,831	13,040
Other	6	0
Accrual for repurchase of common stock	58	0
Financing of insurance premiums with note payable	654	588
Acquisition of Properties [Member]
Common stock issued for acquisition of properties	$ 0	$ 64,694