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Balance Sheet Components - Allowance for Doubtful Accounts (Details) - Allowance for doubtful accounts - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of period | $ 197 | $ 9,371 | $ 9,299
Charged (Credit) to costs and expenses | (30) | 1 | 3
Charged (credit) to other accounts | (12) | 73 | 38
Settlements & write-offs net of recoveries | (49) | (9,248) | 31
Balance at end of period | $ 106 | $ 197 | $ 9,371

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- Definition Valuation Allowances and Reserves, Write-offs, Net Of Recoveries + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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