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Schedule of Trust Investments Fair Value (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
--- | --- | --- | ---
Platform Operator, Crypto Asset [Line Items] |  |  |  |  |
Total | $ 85,235 | [1] | $ 43,136 | [1] | $ 34,934
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Platform Operator, Crypto Asset [Line Items] |  |  |  |  |
Total | 85,235 |  | 43,136 |  |
Fair Value, Inputs, Level 1 [Member] | Platinum [Member] |  |  |  |  |
Platform Operator, Crypto Asset [Line Items] |  |  |  |  |
Total | 85,235 |  | 43,136 |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Platform Operator, Crypto Asset [Line Items] |  |  |  |  |
Total |  |  |  |  |
Fair Value, Inputs, Level 2 [Member] | Platinum [Member] |  |  |  |  |
Platform Operator, Crypto Asset [Line Items] |  |  |  |  |
Total |  |  |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Platform Operator, Crypto Asset [Line Items] |  |  |  |  |
Total |  |  |  |  |
Fair Value, Inputs, Level 3 [Member] | Platinum [Member] |  |  |  |  |
Platform Operator, Crypto Asset [Line Items] |  |  |  |  |
Total |  |  |  |  |
[1] | Cost of investment in platinum: $65,762 and $43,369, respectively.

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