Net Income (Loss) per Share - Schedule of loss per share and weighted average of common stock outstanding (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator [Abstract]
Net income (loss) attributable to Bitcoin Depot Inc. - basic	$ 6,070		$ (2,561)	$ 10,264	$ (4,099)
Net income (loss) attributable to Bitcoin Depot Inc. - diluted	$ 6,070		$ (2,561)	$ 10,264	$ (4,099)
Denominator [Abstract]
Weighted average common stock outstanding - basic	37,541,637	37,541,637	19,432,011	29,406,538	18,016,761
Weighted average common stock outstanding - diluted	37,541,637		19,432,011	29,406,538	18,016,761
Earnings per share, basic	$ 0.16		$ (0.13)	$ 0.35	$ (0.23)
Earnings per share, diluted	0.16		(0.13)	0.35	(0.23)
Bitcoin Depot Inc. [Member]
Denominator [Abstract]
Earnings per share, basic	0.16		(0.13)	0.35	(0.23)
Earnings per share, diluted	$ 0.16		$ (0.13)	$ 0.35	$ (0.23)