Accounts Payable and Accrued Liabilities - Additional Information (Details) - USD ($) $ in Thousands |
Sep. 30, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Payables and Accruals [Abstract] | ||
| Seismic survey cancellation | $ 1,343 | $ 0 |
| X | ||||||||||
- Definition Accrued Survey Costs, Current No definition available.
|
| X | ||||||||||
- References No definition available.
|