Share-Based Compensation (Details) - Second Amended and Restated 2011 Stock Option Plan - USD ($) $ in Thousands |
3 Months Ended | |
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Aug. 31, 2015 |
Aug. 31, 2014 |
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| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Share-based payment expense | $ 912 | $ 1,577 |
| Employee | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Share-based payment expense | 971 | 1,523 |
| Non-Employee | ||
| Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] | ||
| Share-based payment expense | $ (59) | $ 54 |
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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