Revenues (Details) - USD ($) $ in Thousands |
Dec. 27, 2018 |
Dec. 28, 2017 |
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| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Retained Earnings (Accumulated Deficit) | $ 243,563 | $ 119,550 |
| Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| Retained Earnings (Accumulated Deficit) | $ 7,800 |
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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