Organization - Additional Information (Detail) |
12 Months Ended |
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May. 31, 2015
Patent
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| Organization Consolidation And Presentation Of Financial Statements [Line Items] | |
| Number of patent license agreements | 3 |
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- Definition Number of patent license agreement. No definition available.
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- Definition Organization Consolidation And Presentation Of Financial Statements [Line Items] No definition available.
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