|
Note 7. Equity Incentive Plan and Stock-based Compensation (Details) - Fair Value Assumptions Used to Value Performance Stock Unit Awards Granted (USD $)
|
12 Months Ended |
|
Dec. 28, 2014
|
Dec. 29, 2013
|
| Note 7. Equity Incentive Plan and Stock-based Compensation (Details) - Fair Value Assumptions Used to Value Performance Stock Unit Awards Granted [Line Items] |
|
|
| Dividend yield |
0.00% |
|
| Performance Stock Units [Member] | Minimum [Member] |
|
|
| Note 7. Equity Incentive Plan and Stock-based Compensation (Details) - Fair Value Assumptions Used to Value Performance Stock Unit Awards Granted [Line Items] |
|
|
| Range of Stock price on grant date (in Dollars per share) |
17.94 |
|
| Performance Stock Units [Member] | Maximum [Member] |
|
|
| Note 7. Equity Incentive Plan and Stock-based Compensation (Details) - Fair Value Assumptions Used to Value Performance Stock Unit Awards Granted [Line Items] |
|
|
| Range of Stock price on grant date (in Dollars per share) |
21.08 |
|
| Performance Stock Units [Member] |
|
|
| Note 7. Equity Incentive Plan and Stock-based Compensation (Details) - Fair Value Assumptions Used to Value Performance Stock Unit Awards Granted [Line Items] |
|
|
| Range of Stock price on grant date (in Dollars per share) |
|
$ 11.50 |
| Expected volatility |
42.79% |
50.90% |
| Risk-free interest rate |
0.73% |
0.21% |
| Dividend yield |
0.00% |
0.00% |