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Property and Equipment, net (Details) - USD ($)	12 Months Ended
Property and Equipment, net (Details) - USD ($)	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2024
Property and equipment, net
Property and equipment, gross	$ 372,973,000	$ 230,439,000
Less accumulated depreciation and amortization	(206,254,000)	(179,735,000)
Property and equipment, net	166,719,000	50,704,000
Depreciation expense	35,830,000	17,063,000	$ 17,098,000
In-service ISR assets
Property and equipment, net
Property and equipment, gross	3,987,000	1,486,000
Land, building, and leasehold improvements
Property and equipment, net
Property and equipment, gross	85,143,000	31,472,000
Machinery and equipment
Property and equipment, net
Property and equipment, gross	185,263,000	131,236,000
Furniture and fixtures
Property and equipment, net
Property and equipment, gross	12,028,000	7,324,000
Computer equipment and software
Property and equipment, net
Property and equipment, gross	61,930,000	50,617,000
Construction in process
Property and equipment, net
Property and equipment, gross	$ 24,622,000	$ 8,304,000