Organization and Significant Accounting Policies - Revenue by Category (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2022 USD ($)	Oct. 30, 2021 USD ($)	Oct. 29, 2022 USD ($) segment	Oct. 30, 2021 USD ($)	Apr. 30, 2022 USD ($)
Disaggregation of revenue
Revenue	$ 111,584	$ 122,008	$ 220,100	$ 223,017
Number of Reportable Segments | segment			4
Reserves for Incurred Cost Claim Audits	0		$ 0		$ 0
Contract Liability
Disaggregation of revenue
Revenue	1,080,000	580,000	3,004,000	889,000
Domestic
Disaggregation of revenue
Revenue	67,657	68,663	117,760	137,051
International
Disaggregation of revenue
Revenue	43,927	53,345	102,340	85,966
U.S. government
Disaggregation of revenue
Revenue	84,165	72,076	151,880	143,151
Non-U.S. government
Disaggregation of revenue
Revenue	27,419	49,932	68,220	79,866
FFP
Disaggregation of revenue
Revenue	85,236	98,393	166,065	179,159
CPFF
Disaggregation of revenue
Revenue	25,013	21,594	51,468	40,711
T&M
Disaggregation of revenue
Revenue	1,335	2,021	2,567	3,147
Small UAS
Disaggregation of revenue
Revenue	26,681	54,714	69,937	94,638
TMS
Disaggregation of revenue
Revenue	31,101	18,418	54,113	37,594
MUAS.
Disaggregation of revenue
Revenue	27,281	26,525	46,542	48,904
HAPS
Disaggregation of revenue
Revenue	9,066	10,342	19,281	20,694
Other.
Disaggregation of revenue
Revenue	$ 17,455	$ 12,009	$ 30,227	$ 21,187