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Intangibles, net (Details) - USD ($)
3 Months Ended 12 Months Ended
Apr. 30, 2025
Apr. 30, 2023
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2023
Intangibles, net          
Amortization expense     $ 23,391,000 $ 17,954,000 $ 58,121,000
MUAS          
Intangibles, net          
Amortization expense   $ 34,149,000      
UGV          
Intangibles, net          
Amortization expense $ 4,258,000        
Weighted average          
Intangibles, net          
Weighted average amortization period 3 years   3 years 3 years