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Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) - Restricted Stock Units Activity (Restricted Stock Units (RSUs) [Member])
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9 Months Ended |
|---|---|
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Jan. 31, 2014
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Restricted Stock Units (RSUs) [Member]
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| Note 5 - Disclosure of Compensation Related Costs, Stock Based Payments (Details) - Restricted Stock Units Activity [Line Items] | |
| Unvested at April 30, 2013 | 71,196 |
| Unvested at January 31, 2014 | 148,546 |
| Granted | 91,650 |
| Vested | (14,150) |
| Forfeited | (150) |