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Non-controlling interests - Schedule of Ownership Interests (Detail) - BT Hold Co [Member] - shares	Sep. 30, 2024	Dec. 31, 2023
Noncontrolling Interest [Line Items]
Number of BT HoldCo interests held by Bitcoin Depot Inc.	20,919,174	16,727,691
Number of BT HoldCo interests held by non-controlling interest holders	41,193,024	44,100,000
Total BT HoldCo interests outstanding	62,112,198	60,827,691
Number of BT HoldCo interests held by Bitcoin Depot Inc., Ownership %	32.18%	27.50%
Number of BT HoldCo interests held by non-controlling interest holders, Ownership %	67.82%	72.50%
Total BT HoldCo interests outstanding, Ownership %	100.00%	100.00%

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- Definition

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- Definition

Number of common units issued of limited liability company (LLC).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1

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Number of common units of ownership outstanding of a limited liability company (LLC).

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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.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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