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