Note 3 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenue	$ 20,619	$ 32,316
Oil Sales[Member]
Revenue	18,165	28,352
Natural Gas, Midstream [Member]
Revenue	2,454	3,964
Rockies [Member]
Revenue	7,555	10,390
Rockies [Member] | Oil Sales[Member]
Revenue	7,366	10,064
Rockies [Member] | Natural Gas, Midstream [Member]
Revenue	189	326
West Texas, South Texas, and Gulf Coast [Member]
Revenue	5,393	12,351
West Texas, South Texas, and Gulf Coast [Member] | Oil Sales[Member]
Revenue	5,276	11,820
West Texas, South Texas, and Gulf Coast [Member] | Natural Gas, Midstream [Member]
Revenue	117	531
Mid-Continent [Member]
Revenue	7,671	9,575
Mid-Continent [Member] | Oil Sales[Member]
Revenue	5,523	6,468
Mid-Continent [Member] | Natural Gas, Midstream [Member]
Revenue	$ 2,148	$ 3,107