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Commitments and contingencies.

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Option to purchase mining claims price.

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Percentage of mining claim rights acquired.

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Percentage of net smelter royalty.

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Percentage of royalty.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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The cash outflow from the acquisition of a mineral right which is the right to extract a mineral from the earth or to receive payment, in the form of royalty, for the extraction of minerals.

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The cash outflow from the purchase of mining and mining related assets during the period.

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Commitments and Contingencies - Additional Information (Details)	3 Months Ended	9 Months Ended
	Mar. 31, 2025 USD ($) a	Mar. 31, 2025 USD ($) a MiningClaim	Mar. 31, 2025 CAD ($) MiningClaim
Seabridge Gold Inc.
Commitments And Contingencies [Line Items]
Percentage of outstanding common stock	3.80%	3.80%
Nevada
Commitments And Contingencies [Line Items]
Related party transaction, payments made		$ 50,000
Option Agreement \| Nevada
Commitments And Contingencies [Line Items]
Total consideration payable	$ 300,000	300,000
Total consideration paid		$ 20,000
Grassy Mountain Project
Commitments And Contingencies [Line Items]
Number of mining fields \| MiningClaim		44	44
Area covered by mining claims \| a	589	589
Annual lease payment, year one	$ 60,000	$ 60,000
Option to purchase mining claims, price		$ 560,000
Term of the agreement	25 years	25 years
Operating lease, payments		$ 0
Grassy Mountain Project \| Option Agreement \| Seabridge Gold Inc.
Commitments And Contingencies [Line Items]
Payment to purchase net profit interest			$ 10,000,000
Grassy Mountain Project \| Minimum
Commitments And Contingencies [Line Items]
Royalty rate	2.00%	2.00%
Grassy Mountain Project \| Maximum
Commitments And Contingencies [Line Items]
Royalty rate	4.00%	4.00%
Frost Project \| Nevada
Commitments And Contingencies [Line Items]
Related party transaction, payments made	$ 100,000
Frost Project \| Nevada
Commitments And Contingencies [Line Items]
Number of mining fields \| MiningClaim		40	40
Percentage of mining claim rights acquired		100.00%	100.00%
Total consideration payable	250,000	$ 250,000
Percentage of Net Smelter Royalty		2.00%	2.00%
Rate of right to reduce net smelter royalty by parent		1.00%	1.00%
Payment to reduce NSR by parent		$ 1,000,000
Payment to purchase of Frost Project	$ 100,000