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Note 3 - Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenue	$ 1,738	$ 4,957	$ 5,959	$ 16,394
Oil Sales[Member]
Revenue	1,587	4,375	5,201	14,574
Natural Gas, Midstream [Member]
Revenue	151	582	758	1,820
Rockies [Member]
Revenue	1,123	1,896	4,141	5,741
Rockies [Member] | Oil Sales[Member]
Revenue	1,097	1,851	4,012	5,614
Rockies [Member] | Natural Gas, Midstream [Member]
Revenue	26	45	129	127
West Texas, South Texas, and Gulf Coast [Member]
Revenue	(30)	1,107	734	4,627
West Texas, South Texas, and Gulf Coast [Member] | Oil Sales[Member]
Revenue	61	1,107	715	4,513
West Texas, South Texas, and Gulf Coast [Member] | Natural Gas, Midstream [Member]
Revenue	(91)	0	19	114
Mid-Continent [Member]
Revenue	645	1,954	1,084	6,026
Mid-Continent [Member] | Oil Sales[Member]
Revenue	429	1,417	474	4,447
Mid-Continent [Member] | Natural Gas, Midstream [Member]
Revenue	$ 216	$ 537	$ 610	$ 1,579

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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