Organization and Significant Accounting Policies - Revenue by Category (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 26, 2024	Oct. 28, 2023	Oct. 26, 2024	Oct. 28, 2023
Disaggregation of revenue
Revenue	$ 188,458,000	$ 180,816,000	$ 377,941,000	$ 333,163,000
Contract Liability
Disaggregation of revenue
Revenue	2,475,000	696,000	7,961,000	2,416,000
Domestic
Disaggregation of revenue
Revenue	86,958,000	69,975,000	153,956,000	128,101,000
International
Disaggregation of revenue
Revenue	101,500,000	110,841,000	223,985,000	205,062,000
U.S. government
Disaggregation of revenue
Revenue	140,715,000	149,959,000	289,315,000	251,307,000
Non-U.S. government
Disaggregation of revenue
Revenue	47,743,000	30,857,000	88,626,000	81,856,000
FFP
Disaggregation of revenue
Revenue	168,752,000	159,879,000	340,620,000	289,821,000
CPFF
Disaggregation of revenue
Revenue	18,810,000	19,802,000	35,041,000	41,095,000
T&M
Disaggregation of revenue
Revenue	896,000	1,135,000	2,280,000	2,247,000
UxS
Disaggregation of revenue
Revenue	85,416,000	132,773,000	205,392,000	230,980,000
LMS
Disaggregation of revenue
Revenue	77,715,000	30,249,000	129,688,000	61,166,000
MW
Disaggregation of revenue
Revenue	$ 25,327,000	$ 17,794,000	$ 42,861,000	$ 41,017,000