Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 30, 2019

Accounting Policies [Abstract]

Reconciliation of Changes in Deferred Revenue

A reconciliation of the changes in the Company’s deferred revenue balance for the three months ended March 30, 2019 and March 31, 2018 is as follows:

	Three Months Ended
	March 30, 2019			March 31, 2018
Balance, beginning of period	$	2,225		$	2,520
Additions to deferral		559			223
Revenue recognized		(516	)		(498	)
Balance, end of period		2,268			2,245
Non-current portion of deferred revenue		526			663
Current portion of deferred revenue	$	1,742		$	1,582

Reconciliation of Changes in Warranty Liability

A reconciliation of the changes in the Company’s warranty liability for the three months ended March 30, 2019 and March 31, 2018 is as follows:

	Three Months Ended
	March 30, 2019			March 31, 2018
Balance, beginning of period	$	860		$	1,735
Accruals for product warranties		109			70
Cost of warranty claims		(111	)		(245	)
Adjustment to pre-existing warranties		(151	)		(445	)
Balance, end of period	$	707		$	1,115