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Accounts Receivable and Unbilled Revenue, Net (Details) - USD ($)
$ in Thousands
Mar. 30, 2018
Dec. 29, 2017
Receivables Net Current [Abstract]    
Accounts receivable $ 37,222 $ 44,972
Unbilled revenue 17,033 12,891
Allowance for doubtful accounts (2,312) (2,601)
Accounts receivable and unbilled revenue, net $ 51,943 $ 55,262