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Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue	$ 6,046	$ 7,978	$ 11,437	$ 16,251
Oil Sales[Member]
Revenue	5,472	7,028	10,199	14,124
Natural Gas, Midstream [Member]
Revenue	574	950	1,238	2,127
Rockies [Member]
Revenue	2,083	2,598	3,845	5,025
Rockies [Member] | Oil Sales[Member]
Revenue	2,042	2,470	3,763	4,809
Rockies [Member] | Natural Gas, Midstream [Member]
Revenue	41	128	82	216
West Texas, South Texas, and Gulf Coast [Member]
Revenue	1,876	3,134	3,521	6,298
West Texas, South Texas, and Gulf Coast [Member] | Oil Sales[Member]
Revenue	1,807	3,022	3,406	5,977
West Texas, South Texas, and Gulf Coast [Member] | Natural Gas, Midstream [Member]
Revenue	69	112	115	321
Mid-Continent [Member]
Revenue	2,087	2,246	4,071	4,928
Mid-Continent [Member] | Oil Sales[Member]
Revenue	1,623	1,536	3,030	3,338
Mid-Continent [Member] | Natural Gas, Midstream [Member]
Revenue	$ 464	$ 710	$ 1,041	$ 1,590

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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