v3.7.0.1
Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 01, 2017
Jun. 25, 2016
Jul. 01, 2017
Jun. 25, 2016
Jan. 01, 2017
Operating Loss Carryforwards [Line Items]          
Income tax expense (benefit) $ (1,068) $ 620 $ (856) $ 620  
Foreign Tax Authority          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards         $ 2,200
State and Local Jurisdiction          
Operating Loss Carryforwards [Line Items]          
Operating loss carryforwards         $ 1,900