Schedule of Property and Equipment (Details) - USD ($)	Apr. 30, 2024	Apr. 30, 2023
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 7,350,000	$ 7,112,000
Accumulated depreciation	(5,347,000)	(5,115,000)
Property and equipment, net	2,003,000	1,997,000
Dies, Jigs, and Molds [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,871,000	1,871,000
Dies, Jigs, and Molds [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	3 years
Dies, Jigs, and Molds [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	7 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,832,000	2,632,000
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	5 years
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	10 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 222,000	222,000
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	5 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	10 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 638,000	605,000
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	5 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	32 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,151,000	1,151,000
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	20 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	39 years
Automotive [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 131,000	126,000
Automotive [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	3 years
Automotive [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	5 years
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 425,000	425,000
Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	2 years
Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life years	5 years
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 80,000	$ 80,000