Accrued Liabilities

6 Months Ended

Jun. 30, 2021

Payables and Accruals [Abstract]

Accrued Liabilities

ACCRUED LIABILITIES

Accrued liabilities consist of the following:

	As of June 30, 2021		As of December 31, 2020
Accrued compensation and benefits	$	17,392	$	17,457
Accrued restructuring costs	1,115		2,347
Accrued warranties	1,616		1,683
Professional and legal fees	1,993		1,810
Taxes other than income	4,402		5,013
General services administration contract contingent liability (see Note 12)	—		12,325
Other accrued liabilities	1,737		1,958
	$	28,255	$	42,593

Activity related to accrued warranties was as follows:

	Six Months Ended
	June 30, 2021		June 30, 2020
Balance, beginning of period	$	1,683	$	2,090
Provision for warranty expense	1,284		1,174
Fulfillment of warranty obligations	(1,351)		(1,642)
Balance, end of period	$	1,616	$	1,622