CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Operating Activities
Net income	$ 17,574	$ 33,741
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	25,277	24,652
Amortization of deferred financing fees	764	619
Deferred income taxes	58	1,517
Stock-based compensation	8,280	5,832
Gain on sale of assets	(286)	(5,146)
Inventory impairment charges	6,986	9,643
Pension settlement charge	7,804	0
Other	7,242	(3,971)
Changes in operating assets and liabilities:
Accounts receivable	2,916	(11,725)
Inventories	(11,439)	(27,250)
Other current assets	(5,177)	(8,677)
Accounts payable	2,668	1,955
Income taxes receivable/payable	(2,935)	(148)
Other current liabilities	(8,823)	1,247
Net cash provided by operating activities	50,909	22,289
Investing Activities
Expenditures for property, plant and equipment	(48,625)	(54,706)
Acquisition of mineral interests	(4,661)	(713)
Proceeds from the sale of assets	2,799	822
Equity method investment	(16,702)	(16,556)
Return of equity method investment	3,295	0
Other	(282)	(139)
Net cash used for investing activities	(64,176)	(71,292)
Financing Activities
Net additions to revolving credit agreement	5,000	60,000
Reductions to long-term debt	(4,643)	(4,914)
Debt issuance costs	0	(2,415)
Cash dividends paid	(7,335)	(6,624)
Purchase of treasury shares	(2,534)	(9,944)
Net cash (used for) provided by financing activities	(9,858)	36,727
Cash and Cash Equivalents
Total decrease for the year	(23,125)	(12,276)
Balance at the beginning of the year	72,833	85,109
Balance at the end of the year	49,708	72,833
Affiliated Entity
Financing Activities
(Reductions) additions to note payable to affiliate	$ (346)	$ 624