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Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified | Dec. 28, 2013 | Dec. 29, 2012
--- | --- | ---
Tax effect of temporary differences and carryforwards that give rise to significant portions of the net deferred tax assets |  |
Accruals and reserves | $ 1,792 | $ 2,295
Deferred revenue | 91 | 38
Fixed assets | 423 | 429
Intangibles | 441 | 180
Stock compensation | 696 | 753
Net operating loss | 5,224 | 5,310
Research and development credits | 1,260 | 1,008
Other tax credits | 47 | 47
Other |  | 1
Net deferred tax asset | 9,974 | 10,061
Valuation allowance | (9,974) | (10,061)
Net deferred tax assets |  |

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