Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Jan. 02, 2016 |
Jan. 03, 2015 |
|
| Commitments and Contingencies Disclosure [Abstract] | |||
| Lease expenses | $ 4.2 | $ 2.3 | $ 1.6 |
| Amount required for payment of materials | 5.3 | ||
| Purchase of materials | 132.8 | $ 122.0 | $ 108.7 |
| Letters of credit | 0.3 | ||
| Commitments to purchase equipment | $ 0.2 | ||