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Goodwill (Details) - USD ($)
 12 Months Ended
Apr. 30, 2024
Apr. 30, 2023
Jan. 28, 2024
Goodwill      
Goodwill, Beginning Balance $ 180,801,000 $ 334,347,000  
Additions to goodwill 95,414,000 1,633,000  
Change to goodwill 563,000 (838,000)  
Impairment of goodwill   (156,017,000)  
Goodwill, Ending Balance 275,652,000 180,801,000  
UxS      
Goodwill      
Goodwill, Beginning Balance 161,547,000    
Additions to goodwill 95,414,000    
Change to goodwill 563,000    
Goodwill, Ending Balance 256,398,000 161,547,000  
UMS      
Goodwill      
Goodwill, Beginning Balance 161,547,000 315,093,000  
Additions to goodwill   1,633,000  
Change to goodwill   (838,000)  
Impairment of goodwill   (156,017,000)  
Goodwill, Ending Balance   161,547,000  
MW      
Goodwill      
Goodwill, Beginning Balance 19,254,000 19,254,000  
Goodwill, Ending Balance $ 19,254,000 $ 19,254,000  
MUAS      
Goodwill      
Percentage of estimated fair value exceeded the carrying value     10.00%