Area of mining fields.

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Commitments and contingencies.

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Lessee operating lease liability payments due after two thousand nineteen.

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Lessee operating lease liability payments due two thousand eighteen.

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Lessee operating lease liability payments due two thousand nineteen.

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Option to purchase mining claims price.

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Payment to purchase net profit interest.

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Payments for contractual obligation.

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Percentage of royalty.

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Related party transaction, payments made.

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Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
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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
-Topic 842
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-Section 50
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Number of businesses acquired in business combination.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
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-Section 45
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Commitments and Contingencies - Additional Information (Details) $ in Thousands, $ in Millions	12 Months Ended
	Jun. 30, 2026 USD ($) a MiningClaim	Jun. 30, 2026 CAD ($) MiningClaim	Jun. 30, 2025 USD ($)
Nevada
Commitments And Contingencies [Line Items]
Related party transaction, payments made	$ 50		$ 50
Option Agreement \| Nevada
Commitments And Contingencies [Line Items]
Total consideration payable	300
Total consideration paid	$ 20
Grassy Mountain Project
Commitments And Contingencies [Line Items]
Number of mining fields \| MiningClaim	44	44
Area covered by mining claims \| a	589
Annual lease payment, year one	$ 40
Annual lease payment, year two	40
Annual lease payment, thereafter	60
Option to purchase mining claims, price	$ 560
Term of the agreement	25 years
Annual lease payment made	$ 60
Grassy Mountain Project \| Option Agreement \| Seabridge Gold Inc.
Commitments And Contingencies [Line Items]
Payment to purchase net profit interest		$ 10
Grassy Mountain Project \| Minimum
Commitments And Contingencies [Line Items]
Royalty rate	2.00%
Grassy Mountain Project \| Maximum
Commitments And Contingencies [Line Items]
Royalty rate	4.00%