Significant accounting policies (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Significant Accounting Policies
Net (loss) /income	$ 75,887	$ 629,211	$ 147,341	$ 1,362,675
Accretion of carrying value to redemption value	(589,876)	(964,220)	(1,174,628)	(2,045,343)
Net loss including accretion of carrying value to redemption value	$ (513,989)	$ (335,009)	$ (1,027,287)	$ (682,668)