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Note D - Property and Equipment - Property and Equipment (Details) - USD ($)
$ in Thousands
Jan. 31, 2021
Apr. 30, 2020
Less accumulated depreciation and amortization $ (37,142) $ (35,160)
Total 33,811 30,140
Land [Member]    
Property and equipment 7,594 7,799
Building and Building Improvements [Member]    
Property and equipment 13,145 12,678
Furniture, Fixtures and Equipment [Member]    
Property and equipment 15,182 14,118
Leasehold Improvements [Member]    
Property and equipment 29,825 27,519
Construction in Progress [Member]    
Property and equipment $ 5,207 $ 3,186