v3.8.0.1
Other Income (Expense) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 24, 2016
Sep. 30, 2017
Sep. 24, 2016
Other Income and Expenses [Abstract]        
Interest income $ 107 $ 80 $ 266 $ 151
Interest expense (3) (1) (5) (3)
Gain (loss) on foreign exchange 508 (147) 1,660 (358)
Other income (expense), net 0 1 0 0
Total income (expense) $ 612 $ (67) $ 1,921 $ (210)