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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 29, 2012
Stockholders' Equity [Abstract] |
Activity in stock option plan |
|  |  |  |  | Outstanding Options |
|  | Shares Available for Grant |  |  | Number of Shares |  |  | Aggregate Price |  |  | Weighted Average Exercise Price |
FY 2009: Balances, January 2, 2010 |  |  | 862,157 |  |  |  | 1,583,508 |  |  | $ | 6,169 |  |  | $ | 3.91 |
Additional shares reserved |  |  | 93,299 |  |  |  |  |  |  |  |  |  |  |  |  |
Options granted |  |  | (195,800 | ) |  |  | 195,800 |  |  |  | 780 |  |  |  | 3.98 |
Options exercised |  |  | 0 |  |  |  | (34,558 | ) |  |  | (88 | ) |  |  | 2.54 |
Options cancelled |  |  | 126,684 |  |  |  | (126,684 | ) |  |  | (955 | ) |  |  | 7.54 |
Options expired |  |  | (126,203 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
FY 2010: Balances, January 1, 2011 |  |  | 760,137 |  |  |  | 1,618,066 |  |  | $ | 5,906 |  |  |  | 3.65 |
Additional shares reserved |  |  | 63,063 |  |  |  |  |  |  |  |  |  |  |  |  |
Options granted |  |  | (319,900 | ) |  |  | 319,900 |  |  |  | 1,148 |  |  |  | 3.59 |
Options exercised |  |  | 0 |  |  |  | (99,291 | ) |  |  | (321 | ) |  |  | 3.24 |
Options cancelled |  |  | 72,274 |  |  |  | (72,274 | ) |  |  | (353 | ) |  |  | 4.88 |
Options expired |  |  | (70,353 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
FY 2011: Balances, December 31, 2011 |  |  | 505,221 |  |  |  | 1,766,401 |  |  | $ | 6,380 |  |  |  | 3.61 |
Additional shares reserved |  |  | 324,501 |  |  |  |  |  |  |  |  |  |  |  |  |
Options granted |  |  | (335,050 | ) |  |  | 335,050 |  |  |  | 1,313 |  |  |  | 3.92 |
Options exercised |  |  | 0 |  |  |  | (174,631 | ) |  |  | (445 | ) |  |  | 2.55 |
Options cancelled |  |  | 356,277 |  |  |  | (356,277 | ) |  |  | (1,550 | ) |  |  | 4.35 |
Options expired |  |  | (108,971 | ) |  |  | 0 |  |  |  | 0 |  |  |  | 0 |
FY 2012: Balances, December 29, 2012 |  |  | 741,978 |  |  |  | 1,570,543 |  |  | $ | 5,698 |  |  | $ | 3.63 |
Stock options outstanding and exercisable |
|  | Options Outstanding |  |  | Options Vested and Exercisable |
Range of Exercise Prices |  | Number of Shares Outstanding at December 29, 2012 |  |  | Weighted Average Remaining Contractual Life |  |  | Weighted Average Exercise Price |  |  | Number of Shares Exercisable at December 29, 2012 |  |  | Weighted Average Exercise Price |
|  |  |  |  | (Years) |  |  |  |  |  |  |  |  |  |
$0.82 - $1.00 |  |  | 159,645 |  |  |  | 2.71 |  |  | $ | 0.90 |  |  |  | 158,855 |  |  | $ | 0.90 |
$2.24 - $2.38 |  |  | 166,531 |  |  |  | 2.16 |  |  | $ | 2.33 |  |  |  | 161,232 |  |  | $ | 2.33 |
$2.41 - $2.78 |  |  | 185,237 |  |  |  | 2.06 |  |  | $ | 2.56 |  |  |  | 185,237 |  |  | $ | 2.56 |
$2.93 - $3.52 |  |  | 163,651 |  |  |  | 2.44 |  |  | $ | 3.26 |  |  |  | 128,378 |  |  | $ | 3.24 |
$3.53 - $3.75 |  |  | 147,000 |  |  |  | 5.35 |  |  | $ | 3.66 |  |  |  | 55,031 |  |  | $ | 3.64 |
$3.86 - $3.86 |  |  | 188,500 |  |  |  | 6.96 |  |  | $ | 3.86 |  |  |  | 0 |  |  | $ | 0.00 |
$3.89 - $4.31 |  |  | 226,073 |  |  |  | 4.98 |  |  | $ | 4.11 |  |  |  | 114,659 |  |  | $ | 4.16 |
$4.43 - $5.56 |  |  | 221,419 |  |  |  | 1.41 |  |  | $ | 5.20 |  |  |  | 221,419 |  |  | $ | 5.20 |
$5.69 - $9.79 |  |  | 108,487 |  |  |  | 1.19 |  |  | $ | 7.33 |  |  |  | 108,487 |  |  | $ | 7.33 |
$10.06 - $10.06 |  |  | 4,000 |  |  |  | 1.17 |  |  | $ | 10.06 |  |  |  | 4,000 |  |  | $ | 10.06 |
$0.82 - $10.06 |  |  | 1,570,543 |  |  |  | 3.34 |  |  | $ | 3.63 |  |  |  | 1,137,298 |  |  | $ | 3.58 |
Weighted average assumptions for fair value of options granted |
|  | Employee Stock Option Plan
|  | FY 2012 |  | FY 2011 |  | FY 2010
Average risk free interest rate |  | 0.68% |  | 0.98% |  | 2.03%
Expected life (in years) |  | 4.55 years |  | 4.70 years |  | 4.75 years
Dividend yield |  | 0 |  | 0 |  | 0
Average volatility |  | 89.2% |  | 92.2% |  | 88.2%
Stock-based compensation expense |
|  | FY 2012 Year Ended December 29, 2012 |  |  | FY 2011 Year Ended December 31, 2011 |  |  | FY 2010 Year Ended January 1, 2011 |
Cost of revenues |  | $ | 63 |  |  | $ | 60 |  |  | $ | 64 |
Research and development |  |  | 77 |  |  |  | 76 |  |  |  | 93 |
Sales and marketing |  |  | 105 |  |  |  | 112 |  |  |  | 116 |
General and administrative |  |  | 143 |  |  |  | 230 |  |  |  | 215 |
Total stock-based compensation expense - continuing operations |  |  | 388 |  |  |  | 478 |  |  |  | 488 |
Total stock-based compensation expense - discontinued operations |  |  | 8 |  |  |  | 66 |  |  |  | 63 |
Total stock-based compensation expense |  | $ | 396 |  |  | $ | 544 |  |  | $ | 551 |
Stock options outstanding, exercisable and expected to vest |
|  | Number of Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Value (thousands) |
Options outstanding |  |  | 1,570,543 |  |  | $ | 3.63 |  |  |  | 3.34 |  |  | $ | 1,013 |
Options vested and expected to vest |  |  | 1,471,271 |  |  | $ | 3.63 |  |  |  | 3.16 |  |  | $ | 1,003 |
Options exercisable |  |  | 1,137,298 |  |  | $ | 3.58 |  |  |  | 2.25 |  |  | $ | 980 |
Restricted stock units outstanding, vested and expected to vest |
|  | Number of Shares |  |  | Weighted Average Remaining Contractual Life (years) |  |  | Aggregate Intrinsic Value (thousands) |
As of December 29, 2012 |  |  |  |  |  |  |  |
Restricted stock units outstanding |  |  | 55,999 |  |  |  | 0.94 |  |  | $ | 211 |
Restricted stock units vested and expected to vest |  |  | 48,545 |  |  |  | 0.91 |  |  | $ | 183 |
Restricted stock units and awards |
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at January 1, 2011 |  |  | 0 |  |  | $ | 0.00 |
Restricted stock units granted |  |  | 90,189 |  |  | $ | 3.49 |
Outstanding at December 31, 2011 |  |  | 90,189 |  |  | $ | 3.49 |
Restricted stock units granted |  |  | 55,999 |  |  | $ | 3.85 |
Restricted stock units released |  |  | (15,189 | ) |  | $ | 3.95 |
Restricted stock units forfeited |  |  | (75,000 | ) |  | $ | 3.40 |
Outstanding at December 29, 2012 |  |  | 55,999 |  |  | $ | 3.85 |
|  | Number of Shares |  |  | Weighted Average Grant Date Fair Value |
Outstanding at January 1, 2011 |  |  | 0 |  |  | $ | 0.00 |
Restricted stock awards granted |  |  | 10,126 |  |  | $ | 3.95 |
Outstanding at December 31, 2011 |  |  | 10,126 |  |  | $ | 3.95 |
Restricted stock awards granted |  |  | 10,666 |  |  | $ | 3.75 |
Restricted stock awards released |  |  | (10,126 | ) |  | $ | 3.95 |
Outstanding at December 29, 2012 |  |  | 10,666 |  |  | $ | 3.75 |

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