Note 3 - Acquisitions (Details Textual) $ in Millions				9 Months Ended
	Jun. 27, 2022 shares	Jun. 21, 2022 shares	Mar. 25, 2022 shares	Sep. 30, 2022 USD ($) a shares
Asset Acquisition, Consideration Transferred, Total | $				$ 523.4
Stock Issued During Period, Shares, Acquisitions (in shares) | shares	3,522,117	371,517
Flat Top Operating Area [Member]
Acquisition, Area of Working Interests in Producing Properties and Salt-water Disposal Wells (Acre) | a				42,855
Stock Issued During Period, Shares, Acquisitions (in shares) | shares			6,960,000	10,853,634
Payments to Acquire Oil and Gas Property and Equipment, Total | $				$ 265.0