Common Stock - Authorized - Additional Information (Detail) |
May 23, 2018
$ / shares
shares
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Mar. 31, 2019
$ / shares
shares
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Dec. 31, 2018
$ / shares
shares
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May 22, 2018
shares
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | ||||
| Common stock, shares authorized | shares | 150,000,000 | 150,000,000 | 150,000,000 | 75,000,000 |
| Common stock, par value | $ / shares | $ 0.001 | $ 0.001 | $ 0.001 | |
| Preferred stock, shares authorized | shares | 5,000,000 | 5,000,000 | ||
| Preferred stock, par value | $ / shares | $ 0.001 | $ 0.001 | ||
| Reverse stock split ratio | 0.1 |
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- Definition Face amount or stated value per share of common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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| X | ||||||||||
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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