Stockholders' Equity - Additional Information (Detail) - shares |
Mar. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Stockholders' Equity Note [Abstract] | ||
| Warrants outstanding | 1,524,573 | 1,524,573 |
| Warrants unvested | 652,122 | 652,122 |
| X | ||||||||||
- Definition Number of warrants or rights outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The number of warrants or rights which entitle the entity to receive future services in exchange for the unvested, forfeitable warrants or rights. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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