Warrants - Additional Information (Detail)  | 
 Jul. 25, 2017  
$ / shares  
shares 
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| Financial Advisory Services Agreement [Member] | |
| Class of Warrant or Right [Line Items] | |
| Warrants to purchase common stock, issued | shares | 483,870 | 
| Term of warrants | 5 years | 
| Warrants exercise price per share | $ / shares | $ 0.31 | 
| Series A Preferred Stock [Member] | |
| Class of Warrant or Right [Line Items] | |
| Warrants to purchase common stock, issued | shares | 10,645,161 | 
| Term of warrants | 7 years | 
| Warrants exercise price per share | $ / shares | $ 0.31 | 
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- Definition Warrants term. 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 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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- 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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