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Geographic Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2021
All other      
Product Information      
Deploys in-service assets $ 1,798,000 $ 1,601,000  
Non-U.S. customers | MUAS      
Product Information      
Deploys in-service assets $ 0 $ 48,496,000  
Customer concentration | Sales Revenue | Non-U.S. customers      
Product Information      
Percentage of revenue 53.00% 41.00% 39.00%