NATURE OF OPERATIONS, ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES - Property and Related Depreciation (Details) - USD ($) $ in Thousands	Apr. 30, 2025	Apr. 30, 2024
Property, Plant and Equipment [Line Items]
Miscellaneous other assets	$ 127	$ 128
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	39 years
Aircraft
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Office furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years