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Stockholder' Equity (Tables) | 12 Months Ended
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Dec. 28, 2012
Stockholders' Equity Note [Abstract] |
Schedule Of Compensation Cost [Table Text Block] | The compensation cost that has been charged against income is set forth below (in thousands):
|  | Fiscal Year Ended |
|  | December 28, 2012 |  |  | December 30, 2011 |  |  | December 31, 2010 |
Stock based compensation expense |  | $ | 2,595 |  |  | $ | 1,361 |  |  | $ | 852 |
Restricted stock expense |  |  | 590 |  |  |  | 466 |  |  |  | 285 |
Consultant compensation |  |  | 23 |  |  |  | 87 |  |  |  | 111 |
Total |  | $ | 3,208 |  |  | $ | 1,914 |  |  | $ | 1,248
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The risk-free rate for periods within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant.
|  | Fiscal Year Ended |
|  | December 28, 2012 |  |  | December 30, 2011 |  |  | December 31, 2010 |
Expected dividend yield |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 79 | % |  |  | 77 | % |  |  | 80 | %
Risk-free interest rate |  |  | .82 | % |  |  | 1.82 | % |  |  | 2.13 | %
Expected term (in years) |  |  | 5.21 |  |  |  | 5.49 |  |  |  | 5.60 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] | A summary of option activity under the Plans as of December 28, 2012 is presented below:
Options |  | Shares (000’s) |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value (000’s) |
Outstanding at December 30, 2011 |  |  | 3,064 |  |  |  | 4.79 |  |  |  |  |  |  |  |  |
Granted |  |  | 680 |  |  |  | 10.31 |  |  |  |  |  |  |  |  |
Exercised |  |  | (324 | ) |  |  | 4.67 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (44 | ) |  |  | 6.87 |  |  |  |  |  |  |  |  |
Outstanding at December 28, 2012 |  |  | 3,376 |  |  | $ | 5.89 |  |  |  | 6.32 |  |  | $ | 19,873 |
Exercisable at December 28, 2012 |  |  | 2,176 |  |  | $ | 4.62 |  |  |  | 4.99 |  |  |  | 10,061 |
Schedule of Nonvested Share Activity [Table Text Block] | A summary of the Company’s non-vested options as of December 28, 2012 and changes during the period is presented below:
Nonvested Options |  | Options (000’s) |  |  | Weighted- Average Grant Date Fair Value |
Nonvested at December 30, 2011 |  |  | 1,085 |  |  | $ | 5.35 |
Granted |  |  | 680 |  |  |  | 6.65 |
Vested |  |  | (520 | ) |  |  | 3.48 |
Forfeited |  |  | (44 | ) |  |  | 4.47 |
Nonvested at December 28, 2012 |  |  | 1,201 |  |  | $ | 5.31 |
Schedule of Share-based Compensation, Activity [Table Text Block] | The following table summarizes information about stock options outstanding and exercisable at December 28, 2012 (in thousands, except per share data):
Range of Exercise Prices |  | Number Outstanding at December 28, 2012 |  |  | Options Outstanding Weighted-Average Remaining Contractual Life |  | Weighted- Average Exercise Price |  |  | Number Exercisable at December 28, 2012 |  |  | Weighted- Average Exercise Price |
$0.95 |  |  | 40 |  |  | 6.25 Years |  | $ | .95 |  |  |  | 40 |  |  |  | .95 |
$ 1.56 to $ 2.30 |  |  | 372 |  |  | 5.29 Years |  | $ | 2.21 |  |  |  | 372 |  |  | $ | 2.21 |
$ 2.45 to $ 3.60 |  |  | 266 |  |  | 6.38 Years |  | $ | 3.25 |  |  |  | 203 |  |  | $ | 3.20 |
$ 3.75 to $5.29 |  |  | 702 |  |  | 4.27 Years |  | $ | 4.29 |  |  |  | 631 |  |  | $ | 4.23 |
$ 5.39 to $7.32 |  |  | 1,181 |  |  | 6.83 Years |  | $ | 5.86 |  |  |  | 748 |  |  | $ | 5.91 |
$ 7.50 to $8.12 |  |  | 815 |  |  | 7.80Years |  | $ | 10.08 |  |  |  | 182 |  |  | $ | 8.05 |
|  |  | 3,376 |  |  | 6.32 Years |  | $ | 5.89 |  |  |  | 2,176 |  |  | $ | 4.62 |
Schedule Of Warrant Activity [Table Text Block] | A summary of warrants to purchase Company stock issued to Broadwood as discussed in Note 10 as of December 28, 2012 is presented below:
Warrants |  | Shares (000’s) |  |  | Weighted- Average Exercise Price |  |  | Weighted- Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value (000’s) |
Outstanding at December 30, 2011 |  |  | 1,470 |  |  | $ | 4.10 |  |  |  |  |  |  |  |  |
Granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Outstanding at December 28, 2012 |  |  | 1,470 |  |  | $ | 4.10 |  |  |  | 1.62 |  |  | $ | 6,020 |
Exercisable at December 28, 2012 |  |  | 1,470 |  |  | $ | 4.10 |  |  |  | 1.62 |  |  | $ | 6,020 |
Schedule Of Vested Restricted Sock Units Activity [Table Text Block] | A summary of restricted stock as of December 28, 2012 is presented below:
Restricted Stock |  | Shares (000’s) |  |  | Weighted Average Grant-Date Fair Value per Share |
Outstanding at December 30, 2011 |  |  | 156 |  |  | $ | 5.49 |
Granted |  |  | 115 |  |  |  | 10.84 |
Forfeited |  |  | 8 |  |  |  | 5.49 |
Vested |  |  | 58 |  |  |  | 5.50 |
Outstanding at December 28, 2012 |  |  | 205 |  |  | $ | 8.48

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