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Note B - Property and Equipment, Estimated Useful Lives (Details)	3 Months Ended
	Jul. 31, 2015
Minimum [Member] | Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment	3 years
Minimum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment	5 years
Minimum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment	18 years
Maximum [Member] | Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment	7 years
Maximum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment	15 years
Maximum [Member] | Building and Building Improvements [Member]
Property, Plant and Equipment	39 years

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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X

- Details

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X

- Details

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Namespace Prefix:
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