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Net Income (loss) per Share - Additional Information (Detail) $ in Millions	6 Months Ended
	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

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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