Subsequent Events - Additional Information (Detail) - USD ($) |
3 Months Ended | |||||||||
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Sep. 08, 2017 |
Aug. 31, 2016 |
Sep. 07, 2017 |
Aug. 31, 2017 |
Aug. 24, 2017 |
May 31, 2017 |
Aug. 24, 2016 |
Mar. 18, 2016 |
Mar. 17, 2016 |
Apr. 30, 2010 |
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| Subsequent Event [Line Items] | ||||||||||
| Common stock, shares authorized | 350,000,000 | 375,000,000 | 350,000,000 | 350,000,000 | 250,000,000 | 200,000,000 | 100,000,000 | |||
| Net Proceeds from sale of common stock and warrants | $ 729,500 | |||||||||
| Subsequent Event | Subscription and Securities Purchase Agreement | ||||||||||
| Subsequent Event [Line Items] | ||||||||||
| Number of shares to be sold | 3,336,331 | |||||||||
| Purchase price, per share | $ 0.75 | |||||||||
| Common stock covering common shares | 1,668,163 | |||||||||
| Gross Proceeds from sale of common stock and warrants | $ 2,500,000 | |||||||||
| Class of warrants, exercise price | $ 1.00 | |||||||||
| Term of warrants | 5 years | |||||||||
| Net Proceeds from sale of common stock and warrants | $ 2,240,000 | |||||||||
| Subsequent Event | After Amendment | ||||||||||
| Subsequent Event [Line Items] | ||||||||||
| Common stock, shares authorized | 375,000,000 |
| X | ||||||||||
- Definition Class of warrant or right, term. No definition available.
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- Definition Gross Proceeds from Issuance of Common Stock and Warrants No definition available.
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- Definition Proceeds from issuance of common stock and warrants. No definition available.
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- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. No definition available.
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- Definition Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. No definition available.
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