Fair Value Measurements - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Assets:
Assets, fair value disclosure	$ 4,418
Liabilities:
Liabilities, fair value disclosure	2,620
Level 1
Assets:
Assets, fair value disclosure	0
Liabilities:
Liabilities, fair value disclosure	0
Level 2
Assets:
Assets, fair value disclosure	4,418
Liabilities:
Liabilities, fair value disclosure	2,620
Level 3
Assets:
Assets, fair value disclosure	0
Liabilities:
Liabilities, fair value disclosure	0
Provisional metal sales contracts
Assets:
Derivative asset	1,751	$ 1,103
Liabilities:
Derivative liability	2,620	124
Provisional metal sales contracts \| Level 1
Assets:
Derivative asset	0	0
Liabilities:
Derivative liability	0	0
Provisional metal sales contracts \| Level 2
Assets:
Derivative asset	1,751	1,103
Liabilities:
Derivative liability		124
Provisional metal sales contracts \| Level 3
Assets:
Derivative asset	0	0
Liabilities:
Derivative liability	0	$ 0
Gold and copper swap contracts
Assets:
Derivative asset	2,667
Gold and copper swap contracts \| Level 1
Assets:
Derivative asset	0
Gold and copper swap contracts \| Level 2
Assets:
Derivative asset	2,667
Liabilities:
Derivative liability	0
Gold and copper swap contracts \| Level 3
Assets:
Derivative asset	0
Provisional gold and copper sales contracts
Assets:
Derivative asset	1,751
Provisional gold and copper sales contracts \| Level 2
Liabilities:
Derivative liability	$ 2,620