Gain on Grant of Royalty (Details) oz in Thousands, $ in Thousands		1 Months Ended	4 Months Ended	9 Months Ended
	Apr. 01, 2028 oz t	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2025	Sep. 30, 2024 USD ($)	Dec. 13, 2023 USD ($) installment
Gain on Grant of Royalty
Gain on grant of royalty interest in mineral titles					$ 16,909
Proceeds from grant of royalty interest					$ 17,000
Vista Australia | Subsidiaries | Wheaton | Mt Todd
Gain on Grant of Royalty
Consideration eligible to receive						$ 20,000
Number of instalments for consideration | installment						3
Gain on grant of royalty interest in mineral titles		$ 16,909
Proceeds from grant of royalty interest		$ 10,000	$ 10,000
Vista Australia | Subsidiaries | Wheaton | Mt Todd | Scenario, Plan [Member]
Gain on Grant of Royalty
Royalty rate				1.00%
Increase in royalty rate per annum	0.13%
Threshold limit of average daily processing rate per day | t	15,000
Reduction in royalty rate upon occurrence of events	33.33%
Royalty agreement deliverable benchmark, Commodity amount | oz	3,470
Vista Australia | Subsidiaries | Wheaton | Maximum | Mt Todd | Scenario, Plan [Member]
Gain on Grant of Royalty
Royalty rate	2.00%