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v3.19.2

Accrued Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2019
Payables and Accruals [Abstract] |
Schedule of other accrued liabilities | The components of other accrued liabilities are as follows:
| As of
| June 30, 2019 |  | December 31, 2018
Contract liabilities (Note 3) | $ | 1,147 |  |  | $ | 1,234 |
Accrued remediation contingency (Note 14) | 2,228 |  |  | — |
Other accrued liabilities | 1,907 |  |  | 4,865 |
Total other accrued liabilities | $ | 5,282 |  |  | $ | 6,099 |

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