| CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $) In Thousands | 3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
| Jul. 10, 2011 | Jul. 11, 2010 | Jul. 10, 2011 | Jul. 11, 2010 | |
| CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS | ||||
| Labor, stock-based compensation | $ 130 | $ 211 | $ 375 | $ 420 | 
| Selling, general, and administrative, stock-based compensation | $ 493 | $ 857 | $ 1,106 | $ 1,751 |