v3.26.1
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
 [4]
Dec. 31, 2025
Cash flows from operating activities              
Net loss $ (733) $ (1,137) [1] $ (2,369) [2],[3] $ (33) [2] $ (1,870) $ (2,402) [3]  
Adjustments to reconcile net loss to net cash used in operating activities:              
Depreciation, amortization, depletion and accretion         6,407 5,138  
Stock-based compensation expense         1,934 1,470  
Operating lease expense         1,382 1,161  
Loss on sale of long-term assets, net 290   (27) [3]   290 118 [3]  
Amortization of debt discount and debt issuance costs         205 173  
Other non-cash items, net         (59) (160)  
Changes in operating assets and liabilities:              
Receivables         (5,050) (671)  
Prepaid expenses and other assets         (683) (2,853)  
Inventories         (2,690) (1,580)  
Other long-term assets, net         (2,197) (1,631)  
Accounts payable and accrued expenses         178 (5,709)  
Other current liabilities         1,224 1,651  
Operating lease liabilities         (1,562) 204  
Other long-term liabilities         (168) (185)  
Net cash used in operating activities         (2,659) (5,276)  
Cash flows from investing activities              
Acquisition of property, plant, equipment and intangible assets, net         (1,973) (5,589)  
Acquisition of mine development costs         (128) (96)  
Distributions from equity method investee in excess of cumulative earnings         78 155  
Net cash used in investing activities         (2,023) (5,530)  
Cash flows from financing activities              
Borrowings on revolving credit facility         58,173 61,884  
Repayments of revolving credit facility         (55,714) (57,184)  
Principal payments on notes payable         (358) (393)  
Repurchase of common stock to satisfy tax withholdings         (200) (48)  
Principal payments on finance lease obligations         (117) (264)  
Net cash provided by financing activities         1,784 3,995  
Decrease in Cash and Restricted Cash         (2,898) (6,811)  
Cash and Restricted Cash, beginning of period   $ 15,040   $ 22,235 [4] 15,040 22,235 $ 22,235 [4]
Cash and Restricted Cash, end of period $ 12,142   $ 15,424 [4]   12,142 15,424 $ 15,040
Supplemental disclosure of non-cash investing and financing activities:              
Accrued purchases for property and equipment         912 553  
Acquisition of property and equipment under finance lease         $ 242 $ 0  
[1]
(1) Adjusted to reflect the retrospective change in accounting method for planned major maintenance costs as described in Note 1. See Note 12 for reconciliation to previously reported amounts.
[2]
(1) Adjusted to reflect the retrospective change in accounting method for planned major maintenance costs as described in Note 1. See Note 12 for reconciliation to previously reported amounts.
[3] (1) Adjusted to reflect the retrospective change in accounting method for planned major maintenance costs as described in Note 1. See Note 12 for reconciliation to previously reported amounts
[4]
(1) Adjusted to reflect the retrospective change in accounting method for planned major maintenance costs as described in Note 1. See Note 12 for reconciliation to previously reported amounts.