Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 29, 2012	Dec. 31, 2011
Deferred tax assets:
Reserves and accruals	$ 7,682	$ 12,441
Deferred revenue	1,714	1,308
Shared based compensation	3,129	2,242
Tax credit carry-forwards	1,510	999
Net operating losses	10,830	10,133
Depreciation & amortization	3,273	2,957
Other	945	967
Total deferred tax assets	29,083	31,047
Less: Valuation allowance	(10,229)	(8,142)
Total deferred tax assets net of valuation allowance	18,854	22,905
Deferred tax liabilities:
Depreciation & amortization	(5,797)	(6,229)
Other	(793)	(1,406)
Total deferred tax liabilities	(6,590)	(7,635)
Net deferred tax assets	$ 12,264	$ 15,270