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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jan. 01, 2015
Jan. 01, 2016
Jan. 02, 2015
Jan. 03, 2014
Current tax provision:        
U.S. federal (benefit)   $ 0 $ 3 $ (121)
State   12 15 12
Foreign   443 570 721
Total current provision   455 588 612
Deferred tax provision (benefit):        
U.S. federal and state   0 0 0
Foreign provision (benefit)   473 (841) 104
Total deferred provision (benefit)   473 (841) 104
Provision (benefit) for income taxes $ 300 $ 928 $ (253) $ 716