Note 3 - Acquisitions (Details Textual) - USD ($) $ in Thousands			1 Months Ended		3 Months Ended		6 Months Ended
	Jun. 27, 2022	Jun. 21, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Stock Issued During Period, Shares, Acquisitions	3,522,117	371,517
Stock Issued During Period, Value, Acquisitions					$ 108,383	$ 156,599
Payments to Acquire Oil and Gas Property and Equipment							$ 7,800	$ 12,700
Hannathon Petroleum, LLC Property [Member]
Business Combination, Consideration Transferred			$ 337,200
Stock Issued During Period, Shares, Acquisitions			3,522,117
Stock Issued During Period, Value, Acquisitions			$ 97,200
Alamo Acquisitions [Member]
Business Combination, Consideration Transferred			$ 11,000	$ 156,100
Stock Issued During Period, Shares, Acquisitions			371,517	6,960,000
Stock Issued During Period, Value, Acquisitions			$ 11,200	$ 156,600