Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2020

Payables and Accruals [Abstract]

Schedule of other accrued liabilities

The components of other accrued liabilities are as follows:

	As of
	June 30, 2020		December 31, 2019
Contract liabilities (Note 3)	$	1,168	$	712
Accrued remediation contingency (Note 13)	—		146
Other accrued liabilities	936		1,118
Total other accrued liabilities	$	2,104	$	1,976