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Income Taxes - Textual (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Change in amount of operating loss carryforwards valuation allowance |  | $ 1,500 | $ (25,800) |  |
Increase in valuation allowance for deferred tax assets |  | $ 300 |  |  |
Federal corporate tax rate |  | 35.00% |  |  |
Provisional estimate for income taxes |  | $ 600 |  |  |
Maximum amount company recognize from unrecognized tax benefit |  | 7,151 | $ 6,477 | $ 6,961 | $ 6,442
Unrecognized tax benefits that would impact effective tax rate if recognized |  | 4,000 |  |  |
Scenario, Forecast [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Federal corporate tax rate | 21.00% |  |  |  |
California [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  | 25,600 |  |  |
State research and experimental tax credit carryforward |  | 8,900 |  |  |
Other States [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  | 3,000 |  |  |
Foreign Tax Authority [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Operating loss carryforwards |  | 35,000 |  |  |
Federal [Member] |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
State research and experimental tax credit carryforward |  | $ 7,000 |  |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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