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Stockholders' Equity (Details 3) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 28, 2013 | Dec. 29, 2012 | Dec. 31, 2011
Stock-based compensation expense |  |  |
Total stock-based compensation expense - continuing operations | $ 689 | $ 388 | $ 478
Total stock-based compensation expense – discontinued operations |  | 8 | 66
Total stock-based compensation expense | 689 | 396 | 544
Cost of revenues |  |  |
Stock-based compensation expense |  |  |
Total stock-based compensation expense - continuing operations | 108 | 63 | 60
Research and development |  |  |
Stock-based compensation expense |  |  |
Total stock-based compensation expense - continuing operations | 71 | 77 | 76
Sales and marketing |  |  |
Stock-based compensation expense |  |  |
Total stock-based compensation expense - continuing operations | 113 | 105 | 112
General and administrative |  |  |
Stock-based compensation expense |  |  |
Total stock-based compensation expense - continuing operations | $ 397 | $ 143 | $ 230

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