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Income Taxes (Details 3) (USD $)
In Thousands, unless otherwise specified
Dec. 29, 2012
Dec. 31, 2011
Tax effect of temporary differences and carry-forwards that give rise to significant portions of the net deferred tax assets    
Accruals and reserves $ 2,295 $ 2,775
Deferred revenue 38 70
Fixed assets 429 488
Intangibles 180 6,959
Stock compensation 753 789
Net operating loss 5,310 120
Research and development credits 1,008 508
Other tax credits 47 1
Other (1) (10)
Net deferred tax asset 10,061 11,700
Valuation Allowance 10,061 11,700
Deferred Tax Assets (Liabilities), Net $ 0 $ 0