COMMITMENTS - Benefit Plans (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 30, 2016 |
Jan. 01, 2016 |
Jan. 02, 2015 |
|
| Employee Benefit Plans | |||
| Maximum employee contribution as a percentage of compensation under 401 (k) Plan | 50.00% | ||
| Matching contributions by the company under 401(k) Plan | $ 900,000 | $ 777,000 | $ 624,000 |
| Bonus expense under discretionary bonus plan | 2,709,000 | 1,268,000 | $ 1,500,000 |
| Bonus expense included in accrued liabilities as of the balance sheet date | 2,090,000 | 922,000 | |
| Post employment health benefits | |||
| Unamortized compensation cost | 0 | ||
| Present value of expected payments for health insurance coverage | $ 110,000 | $ 126,000 | |