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Stock Based Compensation (Tables) | 9 Months Ended
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Sep. 28, 2013
Activity in Stock Option Plan | The following table summarizes information regarding activity in our stock option plan during the nine months ended September 2 8, 2013:
|  | Number of Shares |  |  | Weighted Average Exercise Price Per Share |  |  | Aggregate Intrinsic Value (thousands) |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Outstanding at December 29, 2012 |  | 1,570,543 |  |  | $ |  | 3.6 4 |  |  |  |  |
Granted |  | 14 5,800 |  |  | $ |  | 5.59 |  |  |  |  |
Exercised |  | (373,663 | ) |  | $ |  | 2.88 |  |  |  |  |
Canceled or forfeited |  | (117,879 | ) |  | $ |  | 5.54 |  |  |  |  |
Outstanding at September 2 8, 2013 |  | 1,224,801 |  |  | $ |  | 3.92 |  |  | $ |  | 2,706 |
Weighted Average Assumptions for Fair Value Estimate of Stock-Based Awards (Options) | The Company uses the Black-Scholes option-pricing model to estimate fair value of stock-based awards (options) with the following weighted average assumptions:
| Three Months Ended |  |  | Nine Months Ended |
--- | --- | --- | --- | --- | ---
| September 2 8, 2013 |  |  | September 29, 2012 |  |  | September 2 8, 2013 |  |  | September 29, 2012 |
Average risk free interest rate |  | 1.26 |  | % |  |  | 0.59 |  | % |  |  | 1.11 |  | % |  |  | 0.68 |  | %
Expected life (in years) |  | 4.50 years |  |  |  | 4.55 years |  |  |  | 4.50 years |  |  |  | 4.55 years |
Dividend yield |  | 0.0 |  | % |  |  | 0.0 |  | % |  |  | 0.0 |  | % |  |  | 0.0 |  | %
Average volatility |  | 66 |  | % |  |  | 90 |  | % |  |  | 72 |  | % |  |  | 91 |  | %
Stock-Based Compensation Expense | The following table shows stock-based compensation expense included in the condensed consolidated statements of operations for the three months and nine months ended September 2 8, 2013 and September 29, 2012:
| Three Months Ended |  |  | Nine Months Ended |
--- | --- | --- | --- | --- | ---
(in thousands) | September 2 8, 2013 |  |  | September 29, 2012 |  |  | September 2 8, 2013 |  |  | September 29, 2012 |
Cost of revenues | $ |  | 27 |  |  | $ |  |  | 17 |  |  | $ |  |  | 7 8 |  |  | $ |  |  | 51 |
Research and development |  | 17 |  |  |  | 19 |  |  |  | 5 3 |  |  |  | 58 |
Sales and marketing |  | 30 |  |  |  | 29 |  |  |  | 80 |  |  |  | 84 |
General and administrative |  | 103 |  |  |  | (85 | ) |  |  | 300 |  |  |  | 84 |
| $ |  | 177 |  |  | $ |  |  | (20 | ) |  | $ |  |  | 511 |  |  | $ |  |  | 277 |
Stock Options Outstanding, Exercisable and Expected to Vest | Information regarding stock options outstanding, vested and expected to vest and exercisable at September 2 8, 2013 is summarized below:
| Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Value (thousands) |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Options outstanding |  | 1,224,801 |  |  | $ |  | 3.92 |  |  |  | 3.73 |  |  | $ |  | 2,706 |
Options vested and expected to vest |  | 1,155,031 |  |  | $ |  | 3.89 |  |  |  | 3.56 |  |  | $ |  | 2,596 |
Options exercisable |  | 789,589 |  |  | $ |  | 3.67 |  |  |  | 2.42 |  |  | $ |  | 1,967 |
Restricted Stock Units Activity | Information regarding the restricted stock units activity for the nine months ended September 2 8, 2013 is summarized below:
| Number of Shares |
--- | --- | ---
Outstanding at December 29, 2012 |  | 55,999 |
Restricted stock units granted |  | 230,509 |
Restricted stock units released |  | (17,249 | )
Restricted stock units forfeited |  | 0 |
Outstanding at September 2 8, 2013 |  | 269,259 |

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