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Accounts Receivable and Unbilled Revenue, Net (Details) - USD ($)
$ in Thousands
Dec. 29, 2017
Dec. 30, 2016
Receivables Net Current [Abstract]    
Accounts receivable $ 44,972 $ 39,335
Unbilled revenue 12,891 10,638
Allowance for doubtful accounts (2,601) (2,574)
Accounts receivable and unbilled revenue, net $ 55,262 $ 47,399