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Other Current Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 30, 2016
Other Liabilities, Current [Line Items]    
Accrued salaries and wages $ 2,757 $ 2,334
Accrued bonuses 1,173 1,414
Accrued consumption tax 218 424
Accrued insurance 429 501
Accrued income taxes 353 1,095
Other [1] 1,423 1,507
Other current liabilities $ 6,353 $ 7,275
[1] No individual item in “Other” above exceeds 5% of the total other current liabilities