Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Commitments Contingencies And Other Matters [Line Items]
Lease expenses	$ 4.7	$ 4.2	$ 2.3
Amount required for payment of materials	6.1
Purchase of materials	175.7	$ 132.8	$ 122.0
Letters of credit	0.2
Commitments to purchase equipment	1.2
Miami Florida [Member]
Commitments Contingencies And Other Matters [Line Items]
Commitment for tenant improvements	$ 1.8