Accrued Liabilities

12 Months Ended

Dec. 31, 2020

Payables and Accruals [Abstract]

Accrued Liabilities

ACCRUED LIABILITIES

Accrued liabilities consist of the following:

	As of December 31,
	2020		2019
Accrued compensation and benefits	$	17,457	$	15,366
Accrued restructuring costs	2,347		—
Accrued warranties	1,683		2,090
Professional and legal fees	1,810		1,793
Taxes other than income	5,013		4,077
General services administration contract contingent liability (see Note 13)	12,325		11,886
Other accrued liabilities	1,958		2,860
	$	42,593	$	38,072

Activity related to accrued warranties was as follows:

	Years ended December 31,
	2020		2019		2018
Balance, beginning of year	$	2,090	$	2,571	$	2,628
Provision for warranty expense	2,727		3,600		4,096
Fulfillment of warranty obligations	(3,134)		(4,081)		(4,153)
Balance, end of year	$	1,683	$	2,090	$	2,571