CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' DEFICT (unaudited) (Parenthetical) - $ / shares |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
|---|---|---|---|---|---|---|
| Statement Of Stockholders Equity [Abstract] | ||||||
| Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 | $ 0.001 | $ 0.001 | $ 0.001 | $ 0.001 |
| Common stock, authorized | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 | 100,000,000 |
| X | ||||||||||
- 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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| X | ||||||||||
- 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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| X | ||||||||||
- References No definition available.
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