Supplemental Financial Information - Other Liabilities (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Other current liabilities:
Operating lease, liability, current, statement of financial position [extensible list]	Total other current liabilities	Total other current liabilities	Total other current liabilities
Current portion of operating lease obligations	$ 2,724	$ 1,944	$ 2,724
Sales, use and other taxes payable	1,039	948	1,039
Current portion of mine reclamation liability	548	182	548
Other current liabilities	2,334	2,718	2,334
Total other current liabilities	6,645	5,792	6,645
Other long-term liabilities:
Mine reclamation liabilities	$ 7,985	$ 5,981	$ 7,985
Operating lease, liability, noncurrent, statement of financial position [extensible list]	Total other long-term liabilities	Total other long-term liabilities	Total other long-term liabilities
Operating lease obligations, long-term	$ 5,133	$ 8,870	$ 5,133
Other	733	929	733
Total other long-term liabilities	13,851	15,780	13,851
Tinuum Group
Finite-Lived Intangible Assets [Line Items]
Contractually liable amount	$ 1,700	$ 1,700	$ 1,700