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Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 28, 2013
Roll forward of the accounts receivable allowance      
Balance at beginning of period $ 4,177    
Balance at end of period 3,648 $ 4,177  
Foreign Currency Translation      
Transaction gains and losses recorded in income (loss) before (provision) benefit for income taxes 1,000 300 $ 200
Billed Revenues      
Roll forward of the accounts receivable allowance      
Balance at beginning of period 4,177 7,210 9,459
Increases to reserve 2,361 948 5,619
Amounts written off (2,881) (3,993) (7,891)
Effects of foreign currency translation (9) 30 25
Balance at end of period 3,648 4,177 7,210
Unbilled Revenues      
Roll forward of the accounts receivable allowance      
Balance at beginning of period 2,233 1,827 2,921
Increases to reserve 2,832 5,242 443
Amounts written off (2,711) (4,836) (1,538)
Effects of foreign currency translation     1
Balance at end of period $ 2,354 2,233 1,827
NeuCo, Inc. | Billed Revenues      
Roll forward of the accounts receivable allowance      
Change related to NeuCo   $ (18) $ (2)