Accrued Liabilities

6 Months Ended

Jun. 30, 2020

Accrued Liabilities

Accrued Liabilities

6.    Accrued Liabilities

Accrued liabilities were comprised of the following at June 30, 2020 and December 31, 2019:

	June 30,		December 31,
	2020		2019
Property, plant and equipment	$	26	$	47
Employee related expenses		2,135		4,129
Selling, general and administrative		742		1,016
Cost of revenue		786		5,062
Excise, franchise and sales taxes		2,271		2,526
Ad valorem taxes		304		1,598
Other		69		69
Accrued liabilities	$	6,333	$	14,447