Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2026	Jul. 31, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 30,781	$ 20,125
Percentage of completion contracts
Disaggregation of Revenue [Line Items]
Total revenues	14,170	5,080
Goods or services transferred at a point of sale
Disaggregation of Revenue [Line Items]
Total revenues	16,611	15,045
Casino Gaming Revenue
Disaggregation of Revenue [Line Items]
Total revenues	6,841	6,483
Sports Wagering Revenue
Disaggregation of Revenue [Line Items]
Total revenues	1,095	1,287
Casino Non-Gaming Revenue
Disaggregation of Revenue [Line Items]
Total revenues	1,105	1,041
Aircraft Modification
Disaggregation of Revenue [Line Items]
Total revenues	16,301	5,642
Aircraft Avionics
Disaggregation of Revenue [Line Items]
Total revenues	537	1,437
Special Mission Electronics
Disaggregation of Revenue [Line Items]
Total revenues	4,902	4,235
North America
Disaggregation of Revenue [Line Items]
Total revenues	24,946	17,044
Europe
Disaggregation of Revenue [Line Items]
Total revenues	4,204	1,256
Asia
Disaggregation of Revenue [Line Items]
Total revenues	1,530	1,742
Australia and Other
Disaggregation of Revenue [Line Items]
Total revenues	101	83
Professional Services
Disaggregation of Revenue [Line Items]
Total revenues	9,041	8,811
Professional Services \| Percentage of completion contracts
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Professional Services \| Goods or services transferred at a point of sale
Disaggregation of Revenue [Line Items]
Total revenues	9,041	8,811
Professional Services \| Casino Gaming Revenue
Disaggregation of Revenue [Line Items]
Total revenues	6,841	6,483
Professional Services \| Sports Wagering Revenue
Disaggregation of Revenue [Line Items]
Total revenues	1,095	1,287
Professional Services \| Casino Non-Gaming Revenue
Disaggregation of Revenue [Line Items]
Total revenues	1,105	1,041
Professional Services \| Aircraft Modification
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Professional Services \| Aircraft Avionics
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Professional Services \| Special Mission Electronics
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Professional Services \| North America
Disaggregation of Revenue [Line Items]
Total revenues	9,041	8,811
Professional Services \| Europe
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Professional Services \| Asia
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Professional Services \| Australia and Other
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Aerospace Products
Disaggregation of Revenue [Line Items]
Total revenues	21,740	11,314
Aerospace Products \| Percentage of completion contracts
Disaggregation of Revenue [Line Items]
Total revenues	14,170	5,080
Aerospace Products \| Goods or services transferred at a point of sale
Disaggregation of Revenue [Line Items]
Total revenues	7,570	6,234
Aerospace Products \| Casino Gaming Revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Aerospace Products \| Sports Wagering Revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Aerospace Products \| Casino Non-Gaming Revenue
Disaggregation of Revenue [Line Items]
Total revenues	0	0
Aerospace Products \| Aircraft Modification
Disaggregation of Revenue [Line Items]
Total revenues	16,301	5,642
Aerospace Products \| Aircraft Avionics
Disaggregation of Revenue [Line Items]
Total revenues	537	1,437
Aerospace Products \| Special Mission Electronics
Disaggregation of Revenue [Line Items]
Total revenues	4,902	4,235
Aerospace Products \| North America
Disaggregation of Revenue [Line Items]
Total revenues	15,905	8,233
Aerospace Products \| Europe
Disaggregation of Revenue [Line Items]
Total revenues	4,204	1,256
Aerospace Products \| Asia
Disaggregation of Revenue [Line Items]
Total revenues	1,530	1,742
Aerospace Products \| Australia and Other
Disaggregation of Revenue [Line Items]
Total revenues	$ 101	$ 83