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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 03, 2016
Jun. 28, 2015
Jul. 03, 2016
Jun. 28, 2015
Jan. 03, 2016
Income Tax Disclosure [Abstract]          
Net income tax expense $ 27 $ 21 $ 91 $ 61  
Unrecognized tax benefits 36   36   $ 36,000
Penalties and interest accrued     2    
Penalties and interest accrued related to uncertain tax positions 19   19    
Unrecognized tax benefits related to tax positions $ 20   $ 20