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Summary of Significant Accounting Policies - Armada - Annual - Additional Information (Detail) - Armada Acquisition Corp. II - USD ($)
Jun. 30, 2026
Sep. 30, 2025
May 22, 2025
Accounting Policies [Line Items]      
Cash $ 54,503 $ 361,105  
Cash and marketable securities held in Trust Account $ 241,164,305 $ 234,628,166 $ 231,150,000
Percentage of public shares to be redeemed in case of non-completion of business combination 100.00% 100.00% 100.00%
Cash equivalents at carrying value $ 0 $ 0