Income Taxes (Reconciliation of the Federal Statutory and Effective Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Income before income tax benefit	$ 13,144	$ 33,646
Statutory taxes	2,760	7,066
State and local income taxes	339	556
Non-deductible expenses		927
Percentage depletion	(5,398)	(4,683)
R&D and other federal credits		(796)
Settlements and uncertain tax positions		(2,273)
Other, net	(34)	(892)
Income tax benefit at the effective income tax rate	$ (4,430)	$ (95)
Effective income tax rate (percent)	(33.70%)	(0.30%)
Statutory taxes	21.00%	21.00%