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Accounts Receivable and Contract Assets, Net (Details) - USD ($)
$ in Thousands
Jan. 01, 2021
Dec. 27, 2019
Receivables Net Current [Abstract]    
Accounts receivable $ 23,898 $ 35,884
Contract assets 9,485 14,637
Allowance for doubtful accounts (605) (743)
Accounts receivable and unbilled revenue, net $ 32,778 $ 49,778