Note 6 - Property and Equipment - Components of Property and Equipment (Details) - USD ($)	Apr. 30, 2023	Apr. 30, 2022	May 01, 2019
Building and leasehold improvements	$ 1,013,000	$ 1,013,000
Furniture and equipment	4,079,000	4,091,000
Property, Plant and Equipment, Gross	10,392,000	11,546,000
Accumulated depreciation and amortization	(4,604,000)	(4,488,000)
Total property and equipment, net	5,788,000	7,058,000
Property and Equipment [Member]
Operating lease - right-of-use asset	$ 5,300,000	$ 6,442,000	$ 9,575,000