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Organization and Significant Accounting Policies - Revenue by Category (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Jul. 31, 2021 | Aug. 01, 2020
Disaggregation of revenue |  |
Revenue | $ 101,009 | $ 87,450
Contract Liability |  |
Disaggregation of revenue |  |
Revenue | 309 | 1,973
Domestic |  |
Disaggregation of revenue |  |
Revenue | 68,388 | 53,430
International |  |
Disaggregation of revenue |  |
Revenue | 32,621 | 34,020
U.S. government |  |
Disaggregation of revenue |  |
Revenue | 71,075 | 53,796
Non-U.S. government |  |
Disaggregation of revenue |  |
Revenue | 29,934 | 33,654
FFP |  |
Disaggregation of revenue |  |
Revenue | 80,766 | 60,875
CPFF |  |
Disaggregation of revenue |  |
Revenue | 19,117 | 26,569
T&M |  |
Disaggregation of revenue |  |
Revenue | 1,126 | 6
Small UAS |  |
Disaggregation of revenue |  |
Revenue | 39,924 | 56,202
TMS |  |
Disaggregation of revenue |  |
Revenue | 19,176 | 9,534
MUAS |  |
Disaggregation of revenue |  |
Revenue | 22,379 |
Other |  |
Disaggregation of revenue |  |
Revenue | $ 19,530 | $ 21,714

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