Note 17 - Supplemental Oil and Gas Disclosures (Unaudited) - Results of Operating for Oil, Natural Gas and NGL Producing Activities (Details) - USD ($) $ in Thousands	3 Months Ended	4 Months Ended	6 Months Ended	8 Months Ended	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Aug. 21, 2020	Dec. 31, 2019
Oil, NGL and natural gas sales			$ 16,400			$ 8,223	$ 8,115
Lease operating expenses			2,653			4,870	3,372
Production and ad valorem taxes	$ 2,543	$ 94	886	$ 4,207	$ 402	566	449
Exploration and abandonment expense			5,032			4	2,850
Depletion, depreciation and amortization expense			9,877			6,385	4,269
Accretion of discount on asset retirement obligations			51			89	72
Results of operations from oil and gas production activities			$ (2,099)			$ (3,691)	$ (2,897)

A tax assessed on oil and gas production.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
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Accretion expense of asset retirement obligations related to oil and gas producing activities.

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-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
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Depreciation, depletion and amortization, and valuation provisions (impairments) related to oil and gas producing activities.

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Exploration costs from oil and gas producing activities.

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The results of operations for oil and gas producing activities, excluding corporate overhead and interest costs.

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-Name Accounting Standards Codification
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-SubTopic 235
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Production (lifting) costs from oil and gas producing activities, including but not limited to lease operating expense, production and ad valorem taxes, and transportation expense.

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Total revenues from oil and gas producing activities.

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