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v3.20.1

Accrued Liabilities (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2020
Payables and Accruals [Abstract] |
Schedule of other accrued liabilities | The components of other accrued liabilities are as follows:
| As of
| March 31, 2020 |  | December 31, 2019
Contract liabilities (Note 3) | $ | 497 |  |  | $ | 712 |
Accrued remediation contingency (Note 13) | 146 |  |  | 146 |
Other accrued liabilities | 867 |  |  | 1,118 |
Total other accrued liabilities | $ | 1,510 |  |  | $ | 1,976 |

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