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