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Significant accounting policies (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Significant Accounting Policies          
Net (loss) /income $ (90,586) $ 75,887 $ 71,454 $ (214,150) $ 147,341
Accretion of temporary equity to redemption value (7,474) (589,876)   (17,849) (1,174,628)
Net loss including accretion of temporary equity $ (98,060) $ (513,989)   $ (231,999) $ (1,027,287)