STOCK-BASED COMPENSATION (Valuation Assumptions) (Details) - $ / shares |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Jan. 01, 2017 |
|
| Stock-Based Compensation [Abstract] | ||
| Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value | $ 1.78 | $ 1.97 |
| Fair Value Assumptions Expected Term | 5 years 3 months 18 days | 5 years 2 months 12 days |
| Expected stock volatility | 43.47% | 39.98% |
| Risk-free interest rate | 2.00% | 1.20% |