Note 8 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	2022			2021
Expected amount	$	4,171		$	(783	)
State income taxes, net of federal benefit		391			(767	)
Percentage depletion		(2,081	)		(1,725	)
Valuation allowance		(970	)		3,376
Stock-based compensation		—			380
PPP loan forgiveness		—			(2,100	)
Return to provision adjustments		153			1,610
Other		92			35
	$	1,756		$	26

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

	2022			2021
Deferred tax assets:
Net operating loss	$	26,570		$	32,659
Valuation allowance		(3,681	)		(4,651	)
Stock-based compensation		163			—
Other		471			—
Total deferred tax assets		23,523			28,008
Deferred tax liabilities:
Coal properties		(26,446	)		(30,368	)
Investment in partnerships		(1,480	)		(484	)
Other		(203	)		(6	)
Total deferred tax liabilities		(28,129	)		(30,858	)
Net deferred tax liability	$	(4,606	)	$	(2,850	)