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Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details)
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9 Months Ended |
|---|---|
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Jan. 31, 2014
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Minimum [Member]
|
|
| Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 5 years |
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Maximum [Member]
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|
| Note 1 - Nature of Operations and Summary of Significant Accounting Policies (Details) [Line Items] | |
| Finite-Lived Intangible Asset, Useful Life | 15 years |