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Note 5 - Stockholders' Equity - Vested and Expected to Vest Option Awards (Details) - USD ($) $ in Thousands | 12 Months Ended
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May. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options Vested, Outstanding Number | 849,464
Vested (in dollars per share) | $ 8.02
Vested | 2 years 270 days
Vested | $ 5,328,606
Expected to vest (in shares) | 861,612
Expected to vest (in dollars per share) | $ 14.22
Expected to vest | 6 years 251 days
Expected to vest | $ 123,261
Total (in shares) | 1,711,076
Total (in dollars per share) | $ 11.14
Total | 4 years 266 days
Total | $ 5,451,867

X
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of expected to vest options outstanding. + References No definition available. + Details
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- Definition As of the balance sheet date, the number of shares into which expected to vest stock options outstanding can be converted under the option plan. + References No definition available. + Details
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- Definition As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are expected to vest. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested options outstanding. + References No definition available. + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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