Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2020

Payables and Accruals [Abstract]

Schedule of Accrued Liabilities

Accrued liabilities consist of the following:

	As of September 30, 2020		As of December 31, 2019
Accrued compensation and benefits	$	12,373	$	15,366
Accrued restructuring costs	3,430		—
Accrued warranties	1,447		2,090
Professional and legal fees	1,961		1,793
Taxes other than income	2,948		4,077
General services administration contract contingent liability (see Note 13)	13,052		11,886
Other accrued liabilities	2,411		2,860
	$	37,622	$	38,072

Schedule of Activity Related to Accrued Warranties

Activity related to accrued warranties was as follows:

	Nine Months Ended
	September 30, 2020		September 30, 2019
Balance, beginning of period	$	2,090	$	2,571
Provision for warranty expense	1,778		2,672
Fulfillment of warranty obligations	(2,421)		(3,132)
Balance, end of period	$	1,447	$	2,111