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Note D - Property and Equipment - Property and Equipment (Details) - USD ($)
$ in Thousands
Oct. 31, 2016
Apr. 30, 2016
Land [Member]    
Property and equipment $ 6,738 $ 6,711
Building and Building Improvements [Member]    
Property and equipment 11,972 11,928
Furniture, Fixtures and Equipment [Member]    
Property and equipment 15,063 14,941
Leasehold Improvements [Member]    
Property and equipment 23,746 23,308
Construction in Progress [Member]    
Property and equipment 521 250
Less accumulated depreciation and amortization (24,589) (22,383)
Total $ 33,451 $ 34,755