Note B - Summary of Significant Accounting Policies (Detail) - Property and equipment, estimated useful lives

3 Months Ended

Jul. 31, 2012

Property and Equipment

Furniture, fixtures and equipment	3 to 7 years
Leasehold improvements	5 to 15 years
Buildings and improvements	18 to 39 years

Furniture and Fixtures [Member]

Property and Equipment

3 to 7 years

Leasehold Improvements [Member]

Property and Equipment

5 to 15 years

Building and Building Improvements [Member]

Property and Equipment

18 to 39 years