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Income Taxes (Details Narrative 1) - USD ($) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Dec. 22, 2017 | Dec. 30, 2017 | Dec. 31, 2016 | Dec. 26, 2015
Deferred tax assets related to future tax benefit on net operating loss carryforward |  | $ 8,799 |  |
Net operating loss carryforwards |  | 70,419 |  |
Net unrecognized tax benefits |  | 127,306 | $ 109,667 | $ 93,654
Accrued interest and penalties on unrecognized tax benefits |  | 5,605 | 3,901 | 2,479
Increase (decrease) unrecognized tax benefits |  | 1,704 | 1,422 | 320
Reduction in income tax expense |  | (18,168) | $ 11,088 | 6,664
Corporate income tax rate | 21.00% |  | 35.00% |
Minimum [Member] |  |  |  |
Reserves for certain unrecognized tax benefits |  | 20,000 |  |
Maximum [Member] |  |  |  |
Reserves for certain unrecognized tax benefits |  | 25,000 |  |
Various Other Jurisdictions [Member] |  |  |  |
Net operating loss carryforwards |  | 9,608 |  |
Reduction in income tax expense |  | 17,918 | $ 11,151 | $ 6,971
Foreign Tax Authority [Member] | Tax and Customs Administration, Netherlands [Member] |  |  |  |
Net operating loss carryforwards |  | $ 5,234 |  |
Net operating loss carryforwards expiration year |  | 2026 |  |
Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member] |  |  |  |
Net operating loss carryforwards |  | $ 43,210 |  |
Income tax examination year |  | 2012 |  |
Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member] | Minimum [Member] |  |  |  |
Net operating loss carryforwards expiration year |  | 2023 |  |
Foreign Tax Authority [Member] | Swiss Federal Tax Administration (FTA) [Member] | Maximum [Member] |  |  |  |
Net operating loss carryforwards expiration year |  | 2024 |  |
Foreign Tax Authority [Member] | Finnish Tax Administration [Member] |  |  |  |
Net operating loss carryforwards |  | $ 1,757 |  |
Foreign Tax Authority [Member] | Finnish Tax Administration [Member] | Minimum [Member] |  |  |  |
Net operating loss carryforwards expiration year |  | 2025 |  |
Foreign Tax Authority [Member] | Finnish Tax Administration [Member] | Maximum [Member] |  |  |  |
Net operating loss carryforwards expiration year |  | 2027 |  |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] |  |  |  |
Net operating loss carryforwards |  | $ 10,610 |  |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Minimum [Member] |  |  |  |
Net operating loss carryforwards expiration year |  | 2022 |  |
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Maximum [Member] |  |  |  |
Net operating loss carryforwards expiration year |  | 2037 |  |

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