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Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 26, 2020

Accounting Policies [Abstract]

Schedule of Allowance for Doubtful Accounts

Activity related to our allowance for doubtful accounts receivable was as follows (in thousands):

			Fiscal Year Ended
			December 26, 2020						December 28, 2019						December 29, 2018
Balance at beginning of year			$	222					$	185					$	200
Charges (reversals) to costs and expenses			26						37						(15)
Balance at end of year			$	248					$	222					$	185

Schedules of Concentration of Risk, by Customer

The following customers represented 10% or more of our revenues:

			Fiscal Year Ended
			December 26, 2020						December 28, 2019						December 29, 2018
Intel Corporation			31.5		%				25.3		%				19.0		%
Samsung Electronics., LTD.			*						11.5						*

* Less than 10% of revenues.

Schedule of Product Warranty Liability Reconciliation

A reconciliation of the changes in our warranty liability is as follows (in thousands):

			Fiscal Year Ended
			December 26, 2020						December 28, 2019						December 29, 2018
Balance at beginning of year			$	1,942					$	2,102					$	3,662
Accruals			5,727						3,881						3,181
Settlements			(3,751)						(4,041)						(4,741)
Balance at end of year			$	3,918					$	1,942					$	2,102

Schedule of Calculation of Numerator and Denominator in Earnings Per Share

The following table reconciles the shares used in calculating basic net income per share and diluted net income per share (in thousands):

			Fiscal Year Ended
			December 26, 2020						December 28, 2019						December 29, 2018
Weighted-average shares used in computing basic net income per share			76,681						74,994						73,482
Add potentially dilutive securities			2,320						2,292						1,700
Weighted-average shares used in computing basic and diluted net income per share			79,001						77,286						75,182

Schedule of Accumulated Other Comprehensive Income (Loss)

Accumulated other comprehensive income (loss) ("OCI") includes the following items, the impact of which has been excluded from earnings and reflected as components of stockholders' equity as shown below (in thousands):

			December 26, 2020						December 28, 2019
Unrealized losses on available-for-sale marketable securities			$	(126)					$	(352)
Translation adjustments and other			5,184						53
Unrealized gains (losses) on derivative instruments			828						(360)
Accumulated other comprehensive income (loss)			$	5,886					$	(659)

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Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

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