Derivative Liability - Additional Information (Detail) - USD ($) |
3 Months Ended | |
|---|---|---|
Aug. 31, 2018 |
Aug. 31, 2017 |
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| Derivative [Line Items] | ||
| Change in fair value of derivative liability | $ (747,467) | $ (362,666) |
| X | ||||||||||
- 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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| X | ||||||||||
- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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