Commitments and Contingencies (Details) $ in Thousands, $ in Thousands	1 Months Ended	6 Months Ended
	May 31, 2025 AUD ($)	Jun. 30, 2025 AUD ($)	Jun. 30, 2025 USD ($)
Loss Contingencies [Line Items]
Penalties totaling	$ 162,000
Mexican Tax Authority | Subsidiaries
Loss Contingencies [Line Items]
Loss contingency, range of possible loss, portion not accrued			$ 3,700
Mt Todd, Australia | Scenario, Plan
Loss Contingencies [Line Items]
Rehabilitation liabilities		$ 73,000
Mt Todd, Australia | Scenario, Plan | Jawoyn Association Aboriginal Corporation
Loss Contingencies [Line Items]
Percentage of royalty on gold		1.00%
Mt Todd, Australia | Scenario, Plan | Minimum | Jawoyn Association Aboriginal Corporation
Loss Contingencies [Line Items]
Gross proceeds royalty, Additional contingent gross proceeds royalty, Percent		0.125%	0.125%
Gross proceeds royalty, Including contingent additional gross proceeds royalty, Percent		1.125%	1.125%
Mt Todd, Australia | Scenario, Plan | Maximum | Jawoyn Association Aboriginal Corporation
Loss Contingencies [Line Items]
Gross proceeds royalty, Additional contingent gross proceeds royalty, Percent		2.00%	2.00%
Gross proceeds royalty, Including contingent additional gross proceeds royalty, Percent		3.00%	3.00%