Segment information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment information
Professional service fee in connection with the business combination	$ (40,000)	$ 0	$ (75,000)	$ (10,000)
Other formation and operating costs	(113,989)	(155,009)	(232,287)	(292,668)
Total formation and operating costs	(153,989)	(155,009)	(307,287)	(302,668)
Interest earned on investment held in trust account	229,876	784,220	454,628	1,665,343
Net income	$ 75,887	$ 629,211	$ 147,341	$ 1,362,675