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v3.25.3

Summary of significant accounting policies - Prepayments, net (Details) - USD ($) | 12 Months Ended
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Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2023
Summary of significant accounting policies |  |  |
Provision for doubtful debts recognized | $ 0 | $ 117,000 | $ 0

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- Definition Amount of expense (reversal of expense) for expected credit loss on prepayments. + References No definition available. + Details
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Namespace Prefix: | btog_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration