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Net Income (loss) per Share - Additional Information (Detail) $ in Millions | 6 Months Ended
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Jun. 30, 2023 USD ($)
Earnings Per Share [Abstract] |
Net income (loss) post merger | $ (1.6)

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- Definition Net income loss post merger. + References No definition available. + Details
Name: | btm_NetIncomeLossPostMerger
Namespace Prefix: | btm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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