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Segments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2021
Segment Reporting Information [Line Items]      
Gross margin $ 173,514 $ 141,236 $ 164,558
Income (loss) from operations (178,663) (9,887) 43,313
Total assets 824,577 914,200  
Product segments      
Segment Reporting Information [Line Items]      
Revenue 540,536 445,732 394,912
Gross margin 173,514 141,236 164,558
Income (loss) from operations (178,663) (9,887) 43,313
Impairment of goodwill and accelerated amortization 190,166    
Acquisition-related expenses 1,385 4,854 7,981
Amortization of acquired intangible assets and other purchase accounting adjustments 29,418 36,707 7,458
Adjusted income (loss) from operations 42,306 31,674 58,752
Total assets 824,577 914,200  
SUAS | Product segments      
Segment Reporting Information [Line Items]      
Revenue 233,908 178,201 235,854
Gross margin 121,332 83,759 119,062
Income (loss) from operations 64,650 28,980 58,194
Acquisition-related expenses   502 3,026
Amortization of acquired intangible assets and other purchase accounting adjustments 2,688 2,828 2,649
Adjusted income (loss) from operations 67,338 32,310 63,869
Total assets 181,300 110,286  
TMS | Product segments      
Segment Reporting Information [Line Items]      
Revenue 120,624 76,415 87,268
Gross margin 42,736 24,486 26,675
Income (loss) from operations 8,074 (3,120) (3,131)
Acquisition-related expenses   297 1,661
Adjusted income (loss) from operations 8,074 (2,823) (1,470)
Total assets 103,375 91,862  
MUAS | Product segments      
Segment Reporting Information [Line Items]      
Revenue 70,327 93,156 15,837
Gross margin (24,355) 6,155 2,965
Income (loss) from operations (252,568) (27,715) (1,869)
Impairment of goodwill and accelerated amortization 190,166    
Acquisition-related expenses 604 1,994 1,682
Amortization of acquired intangible assets and other purchase accounting adjustments 21,573 22,170 4,356
Adjusted income (loss) from operations (40,225) (3,551) 4,169
Total assets 224,572 388,058  
All other | Product segments      
Segment Reporting Information [Line Items]      
Revenue 115,677 97,960 55,953
Gross margin 33,801 26,836 15,856
Income (loss) from operations 1,181 (8,032) (9,881)
Acquisition-related expenses 781 2,061 1,612
Amortization of acquired intangible assets and other purchase accounting adjustments 5,157 11,709 453
Adjusted income (loss) from operations 7,119 5,738 $ (7,816)
Total assets 108,195 94,765  
Corporate | Product segments      
Segment Reporting Information [Line Items]      
Total assets $ 207,135 $ 229,229