Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 28, 2019

Accounting Policies [Abstract]

Reconciliation of Changes in Allowance for Doubtful Accounts

A reconciliation of the changes in our allowance for doubtful accounts balances for the years ended December 28, 2019 and December 29, 2018 are as follows (in thousands):

	Balance at							Balance
	Beginning of							at End of
Description	The period		Additions		(Deductions)			The period
Allowance for doubtful accounts Years ended
December 28, 2019		213		25		(51	)		187
December 29, 2018		226		31		(44	)		213

Reconciliation of Changes in Deferred Revenue

A reconciliation of the changes in our deferred revenue balances for the years ended December 28, 2019 and December 29, 2018 are as follows (in thousands):

FY 2017: Balance as of December 30, 2017	$	2,520
Additions to deferral		1,984
Revenue recognized		(2,279	)
FY 2018: Balance as of December 29, 2018		2,225
Additions to deferral		2,164
Revenue recognized		(2,579	)
FY 2019: Balance as of December 28, 2019	$	1,810

Reconciliation of Changes in Warranty Liability

A reconciliation of the changes in our warranty liability for the years ended December 28, 2019 and December 29, 2018 are as follows (in thousands):

FY 2017: Balance as of December 30, 2017	$	1,735
Accruals for product warranties		454
Cost of warranty claims		(884	)
Adjustment to pre-existing warranties		(445	)
FY 2018: Balance as of December 29, 2018		860
Accruals for product warranties		283
Cost of warranty claims		(296	)
Adjustment to pre-existing warranties		(311	)
FY 2019: Balance as of December 28, 2019	$	536