Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2019

Payables and Accruals [Abstract]

Schedule of other accrued liabilities

The components of other accrued liabilities are as follows:

	As of
	September 30, 2019		December 31, 2018
Contract liabilities (Note 3)	$	682	$	1,234
Accrued remediation contingency (Note 14)	760		—
Other accrued liabilities	977		4,865
Total other accrued liabilities	$	2,419	$	6,099