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Capital Stock and Stock-Based Awards (Details) - Schedule of capital stock - shares | May. 31, 2015 | May. 31, 2014
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Capital Stock and Stock-Based Awards (Details) - Schedule of capital stock [Line Items] |  |
Authorized | 70,000,000 | 70,000,000
Authorized | 2,000,000 | 2,000,000
Outstanding | 31,477,251 | 30,605,978
Common Class A [Member] |  |
Capital Stock and Stock-Based Awards (Details) - Schedule of capital stock [Line Items] |  |
Authorized | 4,000,000 |
Reserved for Issuance | 1,166,000 |
Outstanding | 1,656,200 |
Common Stock [Member] |  |
Capital Stock and Stock-Based Awards (Details) - Schedule of capital stock [Line Items] |  |
Authorized | 70,000,000 |
Reserved for Issuance | 8,823,910 |
Outstanding | 31,477,251 |
Preferred Stock [Member] |  |
Capital Stock and Stock-Based Awards (Details) - Schedule of capital stock [Line Items] |  |
Authorized | 2,000,000 |
Reserved for Issuance | 0 |
Outstanding | 0 |

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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