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Note D - Property and Equipment - Property and Equipment (Details) - USD ($)
$ in Thousands
Apr. 30, 2017
Apr. 30, 2016
Accumulated depreciation and amortization $ (26,182) $ (22,383)
Property and equipment, net 30,139 34,755
Land [Member]    
Property and equipment 6,742 6,711
Building and Building Improvements [Member]    
Property and equipment 11,972 11,928
Furniture, Fixtures and Equipment [Member]    
Property and equipment 13,143 14,941
Leasehold Improvements [Member]    
Property and equipment 24,464 23,308
Construction in Progress [Member]    
Property and equipment $ 250