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Summary of Significant Accounting Policies - Reconciliation of Changes in Allowance for Doubtful Accounts (Details) - Allowance for Doubtful Accounts - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Valuation And Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of The period $ 230 $ 140 $ 223
Additions 24 128 62
Deductions (28) (38) (145)
Balance at End of The period $ 226 $ 230 $ 140