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Note 11 - Income Taxes - Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Net operating loss carryover | $ 9,012 | $ 8,443
Property and equipment | 1,244 | 0
Percentage depletion and contribution carryovers | 1,987 | 2,004
Deferred compensation liability | 150 | 256
Asset retirement obligations | 4,220 | 3,581
Stock-based compensation | 428 | 439
Lease obligations | 179 | 224
Derivatives | 0 | 390
Other | 212 | 249
Total deferred tax assets | 17,432 | 15,586
Property and equipment | 0 | (6,107)
Derivatives | (421) | 0
Lease assets | (156) | (198)
Total deferred tax liabilities | (577) | (6,305)
Net deferred tax assets | 16,855 | 9,281
Less valuation allowance | (16,871) | (10,179)
Net deferred tax liability | $ (16) | $ (898)

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