|
Note 4. Equity Incentive Plan and Stock-Based Compensation (Detail) - Weighted Average Fair Value of Stock Options Granted (USD $)
|
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2012
|
Sep. 25, 2011
|
Sep. 30, 2012
|
Sep. 25, 2011
|
|
| Weighted average fair value of stock options granted | $ 5.30 | $ 7.71 | $ 4.19 | $ 8.67 |