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Property, plant and equipment - Narrative (Details) - Mining Hardware $ in Thousands | 1 Months Ended | 12 Months Ended
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May 31, 2024 | Jun. 30, 2024 USD ($) | Jun. 30, 2023
Property, plant and equipment [line items] |  |  |
Useful life measured as period of time, property, plant and equipment |  | 5 years |
Fair value of asset |  | $ 16,770 |
Miner Purchase Option With Bitmain S 21 Pro |  |  |
Property, plant and equipment [line items] |  |  |
Hashrate operating capacity of Bitmain miners | 30 |  | 10
Maximum |  |  |
Property, plant and equipment [line items] |  |  |
Useful life measured as period of time, property, plant and equipment |  | 4 years |

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