Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2023			2022
Expected amount	$	10,344		$	4,171
State income taxes, net of federal benefit		1,246			391
Percentage depletion		(3,348	)		(2,081	)
Change in valuation allowance		(3,681	)		(970	)
Stock-based compensation		(844	)		—
Return to provision adjustments		159			153
Other		589			92
Total income tax expense	$	4,465		$	1,756

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2023			2022
Deferred tax assets:
Net operating loss	$	20,029		$	26,570
Power contracts		23,302			34,233
Compensation		2,287			1,344
Accrued liabilities		570			556
Other		2,016			471
Total deferred tax assets		48,204			63,174
Valuation allowance		—			(3,681	)
Deferred tax assets, net of valuation allowance		48,204			59,493
Deferred tax liabilities:
Coal properties		(25,764	)		(27,700	)
Power properties		(31,126	)		(35,702	)
Investment partnerships		(549	)		(494	)
Other		—			(203	)
Total deferred tax liabilities		(57,439	)		(64,099	)
Net deferred tax liability	$	(9,235	)	$	(4,606	)