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Computer hardware prepayments - Narrative (Details) $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
May 31, 2024 | Jun. 30, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | May 31, 2025 USD ($) | Mar. 31, 2025 USD ($)
Property, plant and equipment [line items] |  |  |  |  |  |
Computer hardware prepayments |  | $ 239,841 | $ 68 |  |  |
Impairment of assets |  | 0 | 105,172 | $ 167 |  |
Mining Hardware |  |  |  |  |  |
Property, plant and equipment [line items] |  |  |  |  |  |
Impairment of assets |  |  | 12,961 |  |  |
Mining Hardware | IE CA 3 Holdings Ltd. |  |  |  |  |  |
Property, plant and equipment [line items] |  |  |  |  |  |
Impairment of assets |  |  | 2,381 |  |  |
Mining Hardware | Miner Purchase Option With Bitmain S 21 Pro |  |  |  |  |  |
Property, plant and equipment [line items] |  |  |  |  |  |
Impairment of assets |  |  | $ 11,301 |  |  |
Hashrate operating capacity of Bitmain miners | 30 |  | 10 |  |  |
Mining Hardware | IE CA 3 Holdings Ltd. |  |  |  |  |  |
Property, plant and equipment [line items] |  |  |  |  |  |
Impairment of assets |  |  | $ 1,660 |  |  |
Bitcoin Mining Hardware |  |  |  |  |  |
Property, plant and equipment [line items] |  |  |  |  |  |
Computer hardware prepayments |  | 203,783 |  |  |  |
Bitcoin Mining Hardware | Forecast |  |  |  |  |  |
Property, plant and equipment [line items] |  |  |  |  |  |
Expected option deposits expire |  |  |  |  | $ 13,290 | $ 22,768
Bitcoin Mining Hardware, Nonrefundable |  |  |  |  |  |
Property, plant and equipment [line items] |  |  |  |  |  |
Computer hardware prepayments |  | $ 36,058 |  |  |  |
Non-refundable deposit percentage |  | 10.00% |  |  |  |

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