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Organization and Significant Accounting Policies - Revenue by Category (Details) - USD ($)
3 Months Ended 9 Months Ended
Jan. 25, 2025
Jan. 27, 2024
Jan. 25, 2025
Jan. 27, 2024
Disaggregation of revenue        
Revenue $ 167,636,000 $ 186,578,000 $ 545,577,000 $ 519,741,000
Contract Liability        
Disaggregation of revenue        
Revenue 1,701,000 610,000 9,662,000 3,026,000
Domestic        
Disaggregation of revenue        
Revenue 104,097,000 62,865,000 258,053,000 186,445,000
International        
Disaggregation of revenue        
Revenue 63,539,000 123,713,000 287,524,000 333,296,000
U.S. government        
Disaggregation of revenue        
Revenue 129,029,000 133,761,000 418,345,000 385,069,000
Non-U.S. government        
Disaggregation of revenue        
Revenue 38,607,000 52,817,000 127,232,000 134,672,000
FFP        
Disaggregation of revenue        
Revenue 148,768,000 167,256,000 489,388,000 457,077,000
CPFF        
Disaggregation of revenue        
Revenue 17,372,000 17,925,000 52,413,000 59,445,000
T&M        
Disaggregation of revenue        
Revenue 1,496,000 1,397,000 3,776,000 3,219,000
UxS        
Disaggregation of revenue        
Revenue 63,750,000 113,290,000 269,142,000 344,270,000
LMS        
Disaggregation of revenue        
Revenue 83,941,000 57,658,000 213,629,000 118,824,000
MW        
Disaggregation of revenue        
Revenue $ 19,945,000 $ 15,630,000 $ 62,806,000 $ 56,647,000