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Note 3 - Revenue From Contracts With Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue	$ 5,391	$ 8,272
Oil Sales[Member]
Revenue	4,727	7,095
Natural Gas, Midstream [Member]
Revenue	664	1,177
Rockies [Member]
Revenue	1,762	2,426
Rockies [Member] | Oil Sales[Member]
Revenue	1,721	2,338
Rockies [Member] | Natural Gas, Midstream [Member]
Revenue	41	88
West Texas, South Texas, and Gulf Coast [Member]
Revenue	1,645	3,164
West Texas, South Texas, and Gulf Coast [Member] | Oil Sales[Member]
Revenue	1,599	2,955
West Texas, South Texas, and Gulf Coast [Member] | Natural Gas, Midstream [Member]
Revenue	46	209
Mid-Continent [Member]
Revenue	1,984	2,682
Mid-Continent [Member] | Oil Sales[Member]
Revenue	1,407	1,802
Mid-Continent [Member] | Natural Gas, Midstream [Member]
Revenue	$ 577	$ 880

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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