Revenues (Details) - USD ($) $ in Thousands |
Mar. 29, 2018 |
Dec. 29, 2017 |
Dec. 28, 2017 |
|---|---|---|---|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
| Retained Earnings (Accumulated Deficit) | $ 159,247 | $ 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 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|