Significant accounting policies (Details) - USD ($)	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Significant Accounting Policies
Net income	$ 71,454	$ 733,464
Accretion of carrying value to redemption value	(584,752)	(1,081,123)
Net loss including accretion of carrying value to redemption value	$ (513,298)	$ (347,659)

Amount after tax of income (loss) from continuing operations including portion attributable to the noncontrolling interest.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details