Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Current:
Domestic	$ 4,796,000	$ 21,084,000	$ 14,468,000
International	4,093,000	(3,009,000)	2,845,000
Total Current	8,889,000	18,075,000	17,313,000
Deferred:
Domestic	5,591,000	5,444,000	(70,000)
International	(2,272,000)	(719,000)	(375,000)
Total Deferred	3,319,000	4,725,000	(445,000)
Provision for income taxes	12,208,000	22,800,000	16,868,000
Effective income tax rate reconciliation
Federal statutory rate (as a percent)	35.00%	35.00%	35.00%
Foreign tax rate benefit (as a percent)	(8.20%)	(11.80%)	(11.00%)
Research and development tax credits (as a percent)	(14.60%)	(0.50%)	(8.50%)
Release of prior year unrecognized tax benefits (as a percent)		(8.40%)
Intercompany technology license (as a percent)		11.80%	10.40%
Excess officer compensation (as a percent)	1.90%	1.00%	3.20%
Valuation allowance	3.80%
Nondeductible acquisition costs (as a percent)	0.20%	0.10%	2.90%
Other (as a percent)	1.60%	(0.80%)	0.20%
Effective income tax rate (as a percent)	19.70%	26.40%	32.20%
Undistributed earnings of foreign subsidiaries	292,300,000
Income before income taxes
Domestic	41,849,000	80,494,000	48,282,000
Foreign	20,178,000	5,854,000	4,058,000
Income before income taxes	62,027,000	86,348,000	52,340,000
Valuation allowance related to certain state loss and research and development tax credit carryforwards	1,700,000
Release of valuation allowance due to the expiration of certain state net operating loss carryforwards	400,000
Reduction of valuation allowance related to an adjustment of certain acquired state net operating losses and research and development tax credit carryforwards	200,000
Deferred tax assets:
Net operating loss carryforwards	38,399,000	35,847,000
Research and development tax credit carryforwards	9,276,000	8,447,000
Stock-based compensation	6,757,000	8,133,000
Capitalized research and development	8,999,000	9,708,000
Deferred income on shipments to distributors	5,733,000	3,933,000
Accrued liabilities and other	8,302,000	7,503,000
Deferred tax assets	77,466,000	73,571,000
Less: Valuation allowance	(3,775,000)	(2,114,000)
Deferred tax assets, net	73,691,000	71,457,000
Deferred tax liabilities:
Acquired intangibles	38,444,000	28,653,000
Depreciation and amortization	2,022,000	1,076,000
Prepaid expenses and other	1,889,000	1,447,000
Deferred tax liabilities	42,355,000	31,176,000
Net deferred tax assets	$ 31,336,000	$ 40,281,000