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Note D - Property and Equipment - Property and Equipment (Details) - USD ($)
$ in Thousands
Oct. 31, 2020
Apr. 30, 2020
Less accumulated depreciation and amortization $ (36,402) $ (35,160)
Total 32,738 30,140
Land [Member]    
Property and equipment 7,594 7,799
Building and Building Improvements [Member]    
Property and equipment 12,062 12,678
Furniture, Fixtures and Equipment [Member]    
Property and equipment 14,502 14,118
Leasehold Improvements [Member]    
Property and equipment 28,975 27,519
Construction in Progress [Member]    
Property and equipment $ 6,007 $ 3,186