|
Note 6. Equity Incentive Plan and Stock-Based Compensation (Details) - Valuation Assumption - Stock Options (Employee Stock Option [Member])
|
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2013
|
Jul. 01, 2012
|
Jun. 30, 2013
|
Jul. 01, 2012
|
|
|
Employee Stock Option [Member]
|
||||
| Note 6. Equity Incentive Plan and Stock-Based Compensation (Details) - Valuation Assumption - Stock Options [Line Items] | ||||
| Expected volatility | 43.79% | 51.11% | 49.45% | 51.23% |
| Risk-free interest rate | 1.15% | 0.63% | 0.85% | 0.76% |
| Expected term (in years) | 4 years 127 days | 4 years 127 days | 4 years 127 days | 4 years 127 days |
| Dividend yield | 0.00% | 0.00% | 0.00% | 0.00% |