Preferred Stock - Additional Information (Detail) - $ / shares |
Sep. 30, 2018 |
Dec. 31, 2017 |
Mar. 10, 2017 |
Mar. 03, 2017 |
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| Temporary Equity Disclosure [Abstract] | ||||
| Preferred stock, shares authorized | 10,000,000 | 10,000,000 | 10,000,000 | 10,000,000 |
| Preferred stock, par value | $ 0.0001 | $ 0.0001 | $ 0.0001 | $ 0.0001 |
| Preferred stock, shares issued | 0 | 0 | ||
| Preferred stock, shares outstanding | 0 | 0 |
| 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 Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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