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Note D - Property and Equipment (Details) - USD ($)
$ in Thousands
Apr. 30, 2016
Apr. 30, 2015
Land [Member]    
Property and equipment $ 6,711 $ 6,245
Building and Building Improvements [Member]    
Property and equipment 11,928 11,509
Furniture, Fixtures and Equipment [Member]    
Property and equipment 14,941 13,486
Leasehold Improvements [Member]    
Property and equipment 23,308 21,023
Construction in Progress [Member]    
Property and equipment 250 1,235
Accumulated depreciation and amortization (22,383) (19,535)
$ 34,755 $ 33,963