v3.26.1
Summary of Significant Accounting Policies - Income taxes (Details) - USD ($)
3 Months Ended 4 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Summary of Significant Accounting Policies      
Income tax payments   $ 0  
Avalanche Treasury Company, LLC      
Summary of Significant Accounting Policies      
Income tax expense $ 0   $ 0
Income tax payments $ 0   $ 0