Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Apr. 30, 2022
Segment Reporting Information [Line Items]
Gross margin	$ 33,714	$ 28,723
Income (loss) from continuing operations	(3,274)	(12,113)
Total assets	896,654		$ 914,200
Product segments
Segment Reporting Information [Line Items]
Revenue	108,516	101,009
Gross margin	33,714	28,723
Income (loss) from continuing operations	(3,274)	(12,113)
Acquisition-related expenses	335	3,254
Amortization of acquired intangible assets and other purchase accounting adjustments	6,847	9,124
Adjusted income (loss) from operations	3,908	265
Total assets	896,658		914,200
Small UAS | Product segments
Segment Reporting Information [Line Items]
Revenue	43,256	39,924
Gross margin	21,296	16,920
Income (loss) from continuing operations	8,025	1,958
Acquisition-related expenses		424
Amortization of acquired intangible assets and other purchase accounting adjustments	682	707
Adjusted income (loss) from operations	8,707	3,089
Total assets	102,098		110,286
TMS | Product segments
Segment Reporting Information [Line Items]
Revenue	23,011	19,176
Gross margin	7,746	5,989
Income (loss) from continuing operations	(1,031)	(463)
Acquisition-related expenses		251
Adjusted income (loss) from operations	(1,031)	(212)
Total assets	83,864		91,862
MUAS | Product segments
Segment Reporting Information [Line Items]
Revenue	19,262	22,379
Gross margin	(1,073)	3,181
Income (loss) from continuing operations	(9,584)	(6,381)
Acquisition-related expenses	221	1,384
Amortization of acquired intangible assets and other purchase accounting adjustments	4,831	5,191
Adjusted income (loss) from operations	(4,532)	194
Total assets	383,579		388,058
HAPSMobile
Segment Reporting Information [Line Items]
Revenue	10,215	10,352
Gross margin	3,324	3,174
Income (loss) from continuing operations	2,539	1,103
Acquisition-related expenses		104
Adjusted income (loss) from operations	2,539	1,207
Total assets	9,863		8,148
All other | Product segments
Segment Reporting Information [Line Items]
Revenue	12,772	9,178
Gross margin	2,421	(541)
Income (loss) from continuing operations	(3,223)	(8,330)
Acquisition-related expenses	114	1,091
Amortization of acquired intangible assets and other purchase accounting adjustments	1,334	3,226
Adjusted income (loss) from operations	(1,775)	$ (4,013)
Total assets	85,133		86,617
Corporate | Product segments
Segment Reporting Information [Line Items]
Total assets	$ 232,121		$ 229,229