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Equity-Accounted Investments And Other Long-Term Assets (Narrative-Equity-accounted Investments) (Details) R / shares in Units, R in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 10, 2023 USD ($) | Aug. 10, 2023 ZAR (R) R / shares | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Mar. 31, 2024 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) shares | Jun. 30, 2022 USD ($) | Dec. 31, 2023 shares | Sep. 30, 2022 R / shares | Jun. 30, 2021 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment Realized Gain Loss On Disposal |  |  |  |  |  | $ (161,000) | $ 0 | $ (205,000) |  |  |  |
Proceeds from disposal of equity-accounted investments |  |  |  |  |  | 0 | $ 3,508,000 | 656,000 |  |  |  |
Carbon Tech Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration received on transaction |  |  |  |  |  | 500,000 |  |  |  |  |  |
Equity Method Investment Realized Gain Loss On Disposal |  |  |  |  |  | $ 250,000 |  |  |  |  |  |
Percentage of retained equity ownership interest disposed |  |  |  |  |  | 25.00% |  |  |  |  |  |
Allowance for doubtful loans receivable |  |  |  |  |  |  |  |  | $ 1,000,000.0 |  |  |
Carbon Tech Limited [Member] | Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt, face value |  |  |  | $ 3,000,000 |  |  |  |  |  |  |  |
Notes payable amount |  |  |  | $ 750,000 |  |  |  |  |  |  |  |
Finbond [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Investment shares owned | shares |  |  |  |  |  |  |  |  |  | 220,523,358 |  |
Equity ownership percentage |  |  |  |  |  |  |  |  |  | 27.80% |  |
Cash consideration received on transaction | $ 3,500,000 | R 64.2 |  |  |  |  |  |  |  |  |  |
Sale price per share | R / shares |  | R 0.2911 |  |  |  |  |  |  |  |  |  |
Equity Method Investment Realized Gain Loss On Disposal | $ 0 |  |  |  |  |  |  | $ (400,000) |  |  |  |
Number of shares sold | shares |  |  |  |  |  |  |  | 25,456,545 |  |  |  |
Impairment loss on equity method investment |  |  | $ 1,200,000 |  |  |  |  | $ 1,100,000 |  |  |  |
Share price per share | R / shares |  | R 0.2911 |  |  |  |  |  |  |  |  | R 0.49 |
Percentage of issued and outstanding shares owned by three shareholders |  |  |  |  |  |  |  | 80.00% |  |  |  |
Liquidity discount |  |  |  | 25.00% |  |  |  |  | 15.00% |  |  |
Carbon [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Investment amount owned |  |  |  |  |  |  |  |  | $ 0 |  |  |
Amount received at closing from interest sold |  |  | 250,000 |  |  |  |  |  |  |  |  |
Sale of interest, amount owned in twelve months |  |  | $ 250,000 |  |  |  |  |  |  |  |  |
Sale of interest, remaining amount |  |  |  |  | $ 750,000 |  |  |  |  |  |  |
Carbon [Member] | Carbon Tech Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Investment amount owned |  |  |  |  |  |  |  |  | $ 0 |  |  |
V2 Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful loans receivable |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000
Working capital facility |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000

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