Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 29, 2017	Dec. 30, 2016
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 47,034	$ 21,666
Less accumulated depreciation	(12,654)	(9,648)
Total property and equipment, net	34,380	12,018
Machinery
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	23,464	5,243
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	15,329	11,276
Office Furniture, Fixtures and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	868	220
Vehicles
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	51	10
Construction-In-Progress
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	2,771	2,069
Computer Software, Hardware and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 4,551	$ 2,848