Organization - Additional Information (Detail) |
6 Months Ended | |
---|---|---|
Jun. 30, 2018
Bank
|
Oct. 31, 2015
shares
|
|
Organization Consolidation And Presentation Of Financial Statements [Abstract] | ||
Entity incorporation, date of incorporation | Jun. 08, 2010 | |
Sale of additional share of common stock | shares | 20,000,000 | |
Number of investment banks to act as financial advisers | Bank | 2 |