Net Income (Loss) Per Share - Additional Information (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2018 | |
| Earnings Per Share [Abstract] | |
| Preferred Stock, Dividend Rate, Percentage | 8.00% |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The percentage rate used to calculate dividend payments on preferred stock. No definition available.
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