Earnings (Loss) per Share - Additional Information (Detail) - $ / shares |
Mar. 05, 2015 |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|---|
| Class of Stock [Line Items] | |||
| Common stock, par value | $ 0.01 | $ 0.01 | $ 0.01 |
| Beneficial ownership percentage of acquiring person | 12.50% | ||
| Beneficial ownership percentage of passive institutional investor | 20.00% | ||
| Date on which rights expire | Mar. 05, 2017 | ||
| Percentage of ownership in outstanding common stock | 50.00% | ||
| Minimum [Member] | |||
| Class of Stock [Line Items] | |||
| Percentage of assets or earnings power sold | 50.00% | ||
| Series A Junior Participating Preferred Stock [Member] | |||
| Class of Stock [Line Items] | |||
| Preferred stock, par value | $ 0.01 | ||
| Purchase price of preferred Stock | 12 | ||
| Board of Directors [Member] | |||
| Class of Stock [Line Items] | |||
| Redemption price per right | $ 0.001 |