Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2017

Reconciliation of Changes in Deferred Revenue

A reconciliation of the changes in the Company’s deferred revenue balance for the nine months ended September 30, 2017 and October 1, 2016 is as follows:

	Nine Months Ended
	September 30, 2017			October 1, 2016
Balance, beginning of period	$	1,383		$	1,311
Additions to deferral		981			1,025
Revenue recognized		(961	)		(1,031	)
Balance, end of period	$	1,403		$	1,305

Reconciliation of Changes in Warranty Liability

A reconciliation of the changes in the Company’s warranty liability for the nine months ended September 30, 2017 and October 1, 2016 is as follows:

	Nine Months Ended
	September 30, 2017			October 1, 2016
Balance, beginning of period	$	603		$	603
Accruals for product warranties		319			318
Cost of warranty claims		(240	)		(351	)
Balance, end of period	$	682		$	570