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Note D - Property and Equipment - Property and Equipment (Details) - USD ($)
$ in Thousands
Jan. 31, 2017
Apr. 30, 2016
Less accumulated depreciation and amortization $ (25,272) $ (22,383)
Total 31,313 34,755
Land [Member]    
Property and Equipment 6,738 6,711
Building and Building Improvements [Member]    
Property and Equipment 11,976 11,928
Furniture, Fixtures and Equipment [Member]    
Property and Equipment 13,233 14,941
Leasehold Improvements [Member]    
Property and Equipment 24,347 23,308
Construction in Progress [Member]    
Property and Equipment $ 291 $ 250