Debt instrument exit fee.

No definition available.

Name:	btm_DebtInstrumentExitFee
Namespace Prefix:	btm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt instrument exit fee expensed.

+ References

No definition available.

+ Details

Name:	btm_DebtInstrumentExitFeeExpensed
Namespace Prefix:	btm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of repayments of debt tranches.

+ References

No definition available.

+ Details

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Namespace Prefix:	btm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

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-Name Accounting Standards Codification
-Topic 210
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments applied to interest.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of deferred cost, excluding capitalized cost related to contract with customer; classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=btm_OldNoteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	srt_RangeAxis=srt_MinimumMember
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- Details

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Note Payable - Additional Information (Detail) $ in Millions	Jun. 23, 2023 USD ($)	May 04, 2023 USD ($)	Dec. 21, 2020 USD ($) Tranche	Jun. 30, 2023 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Old Note [Member]
Debt Instrument [Line Items]
Debt instrument, face amount			$ 25.0		$ 5.0	$ 15.0
Debt instrument, interest rate, stated percentage			15.00%
Debt instrument, periodic payment, interest		$ 0.3
Number of repayments of debt tranches \| Tranche			2
Repayments of debt			$ 12.5
Old Note [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, increase		20.00%
Old Note [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, increase		15.00%
New Note [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 20.8
Debt instrument, interest rate, stated percentage	17.00%
Debt instrument, frequency of periodic payment	The Company is required to make monthly interest payments and fixed principal payments every six months beginning on December 15, 2023 through June 15, 2026.
Debt instrument, maturity date	Jun. 23, 2026
Deferred financing costs	$ 2.4
Debt instrument exit Fee	1.8			$ 1.8
Debt instrument exit fee expensed	2.3
Repayments of debt	$ 16.4