Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 26, 2020

Accounting Policies [Abstract]

Reconciliation of Changes in Deferred Revenue

A reconciliation of the changes in the Company’s deferred revenue balance for the nine months ended September 26, 2020 and September 28, 2019 is as follows:

	Nine Months Ended
	September 26, 2020			September 28, 2019
Balance, beginning of period	$	1,810		$	2,225
Additions to deferral		1,067			1,580
Revenue recognized		(1,516	)		(1,892	)
Deductions from reserves		(3	)		(19	)
Balance, end of period		1,358			1,894
Non-current portion of deferred revenue		286			366
Current portion of deferred revenue	$	1,072		$	1,528

Reconciliation of Changes in Warranty Liability

A reconciliation of the changes in the Company’s warranty liability for the nine months ended September 26, 2020 and September 28, 2019 is as follows:

	Nine Months Ended
	September 26, 2020			September 28, 2019
Balance, beginning of period	$	536		$	860
Accruals for product warranties		85			219
Cost of warranty claims		(108	)		(232	)
Adjustment to pre-existing warranties		(229	)		(334	)
Balance, end of period	$	284		$	513