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Commitments and Contingencies - Additional Information (Detail) MMBTU in Millions, $ in Millions | 9 Months Ended
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Sep. 30, 2025 USD ($) MMBTU $ / MMBTU
Commitments And Contingencies [Line Items] |
Accrued liabilities for environmental matters | $ 0.6
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] | Other Accrued Liabilities, Current, Accrued And Other Liabilities Noncurrent
Percentage of payment of investigation costs agreed by Hallowell Facility | 50.00%
Natural Gas Purchase Commitments [Member] |
Commitments And Contingencies [Line Items] |
Natural gas purchase commitments volume | MMBTU | 0.9
Weighted average price of natural gas per unit | $ / MMBTU | 3.45
Weighted average purchase price of natural gas | $ 3.0
Weighted average natural gas market price per unit | $ / MMBTU | 3.26
Weighted average natural gas market price | $ 2.8

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