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Organization and Significant Accounting Policies - Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2020
Intangibles, net      
Impairment recorded $ 0 $ 0 $ 0
Percentage of estimated fair value exceeded the carrying value 9.00%    
Backlog      
Intangibles, net      
Weighted average amortization period 1 year    
Licenses      
Intangibles, net      
Weighted average amortization period 3 years    
In-process research and development      
Intangibles, net      
Weighted average amortization period 3 years    
Trademarks and tradenames      
Intangibles, net      
Weighted average amortization period 6 years    
Minimum | Technology      
Intangibles, net      
Weighted average amortization period 3 years    
Minimum | Customer relationships      
Intangibles, net      
Weighted average amortization period 3 years    
Maximum | Technology      
Intangibles, net      
Weighted average amortization period 12 years    
Maximum | Customer relationships      
Intangibles, net      
Weighted average amortization period 5 years