Other Current Liabilities - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands		Jun. 28, 2019	Dec. 28, 2018
Other Liabilities Disclosure [Abstract]
Accrued salaries and wages		$ 3,907	$ 3,172
Accrued insurance		283	1,061
Accrued consumption tax		488	995
Accrued bonuses		1,784	5,113
Income taxes payable		1,914	1,105
Other	[1]	2,395	1,985
Total other current liabilities		$ 10,771	$ 13,431

[1] No individual item in “Other” exceeds 5% of the other current liabilities