Earnings per (Loss) Share - Schedule of Antidilutive Securities Excluded from the Computation of Earnings Per Common Share (Detail) - shares |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Options [Member] | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Outstanding units and warrants excluded from computation of diluted loss per share/unit | 2,782,874 | 3,006,377 | 2,782,874 | 1,026,605 |
| Restricted Stock Units [Member] | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Outstanding units and warrants excluded from computation of diluted loss per share/unit | 499,889 | 149,495 | 499,889 | |