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Note D - Property and Equipment (Details) - USD ($)
$ in Thousands
Jul. 31, 2015
Apr. 30, 2015
Land [Member]    
Property and equipment $ 6,245 $ 6,245
Building and Building Improvements [Member]    
Property and equipment 11,631 11,509
Furniture, Fixtures and Equipment [Member]    
Property and equipment 14,047 13,486
Leasehold Improvements [Member]    
Property and equipment 21,795 21,023
Construction in Progress [Member]    
Property and equipment 1,178 1,235
Less accumulated depreciation and amortization (20,545) (19,535)
Total $ 34,351 $ 33,963