Accrued Liabilities

12 Months Ended

Dec. 31, 2019

Payables and Accruals [Abstract]

Accrued Liabilities

ACCRUED LIABILITIES

Accrued liabilities consist of the following:

	As of December 31,
	2019		2018
Accrued compensation and benefits	$	15,366	$	17,745
Accrued warranties	2,090		2,571
Professional and legal fees	1,793		2,154
Taxes other than income	4,077		3,550
General services administration contract contingent liability (see Note 13)	11,886		5,267
Other accrued liabilities	2,860		5,040
	$	38,072	$	36,327

Activity related to accrued warranties was as follows:

	Years ended December 31,
	2019		2018		2017
Balance, beginning of year	$	2,571	$	2,628	$	2,594
Provision for warranty expense	3,600		4,096		4,045
Fulfillment of warranty obligations	(4,081)		(4,153)		(4,011)
Balance, end of year	$	2,090	$	2,571	$	2,628