Nature of Operations and Significant Accounting Policies (Details)	3 Months Ended								12 Months Ended																			12 Months Ended
	Dec. 28, 2013 USD ($)	Sep. 28, 2013 USD ($)	Jun. 29, 2013 USD ($)	Mar. 30, 2013 USD ($)	Dec. 29, 2012 USD ($)	Sep. 29, 2012 USD ($)	Jun. 30, 2012 USD ($)	Mar. 31, 2012 USD ($)	Dec. 28, 2013 USD ($)	Dec. 29, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 28, 2013 Stock options, RSU's and ESPP shares	Dec. 29, 2012 Stock options, RSU's and ESPP shares	Dec. 31, 2011 Stock options, RSU's and ESPP shares	Dec. 28, 2013 Building	Dec. 28, 2013 Sales Revenue Sell-Through Distributors	Dec. 29, 2012 Sales Revenue Sell-Through Distributors	Dec. 31, 2011 Sales Revenue Sell-Through Distributors	Dec. 28, 2013 Minimum	Dec. 28, 2013 Minimum Equipment and software	Dec. 28, 2013 Minimum Tooling	Dec. 28, 2013 Maximum USD ($)	Dec. 29, 2012 Maximum USD ($)	Dec. 28, 2013 Maximum Equipment and software	Dec. 28, 2013 Maximum Tooling	Dec. 28, 2013 Not designated as hedges for accounting purposes Foreign exchange contracts JPY (¥)	Dec. 29, 2012 Not designated as hedges for accounting purposes Foreign exchange contracts JPY (¥)	Dec. 28, 2013 Next fiscal year - 2014
Basis of Presentation and Significant Accounting Policies [Line Items]
Fiscal year duration																			364 days			371 days						364 days
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Foreign exchange contracts outstanding																										¥ 240,000,000	¥ 150,000,000
Fair value adjustment through earnings on foreign exchange contracts not designated as hedges																						100,000	100,000
Risks and Uncertainties [Abstract]
Allowance for doubtful accounts	900,000				1,100,000				900,000	1,100,000
Deferred Revenue and Credits [Abstract]
Inventory valued at published list price and held by sell-through distributors with right of return	36,056,000				38,623,000				36,056,000	38,623,000
Allowance for distributor advances	(24,090,000)				(22,450,000)				(24,090,000)	(22,450,000)
Deferred cost of sales related to inventory held by sell-through distributors	(4,471,000)				(5,620,000)				(4,471,000)	(5,620,000)
Total Deferred income and allowances on sales to sell-through distributors	7,495,000				10,553,000				7,495,000	10,553,000
Resale of product by sell-through distributors as a percentage of total revenue									45.00%	55.00%	61.00%					45.00%	55.00%	61.00%
Property, Plant and Equipment [Abstract]
Estimated useful lives of PP&E															30 years					3 years	1 year			5 years	3 years
Undistributed earnings of our Chinese subsidiary	3,400,000								3,400,000
Earnings Per Share [Abstract]
Net income (loss)	6,547,000	8,844,000	5,040,000	1,890,000	(7,175,000)	(2,175,000)	(12,542,000)	(7,714,000)	22,321,000	(29,606,000)	78,232,000
Shares used in basic Net (loss) income per share									115,701,000	117,194,000	117,875,000
Dilutive effect of stock options, RSUs and ESPP shares									1,380,000	0	3,264,000
Shares used in diluted Net (loss) income per share									117,081,000	117,194,000	121,139,000
Basic Net (loss) income per share	$ 0.06	$ 0.08	$ 0.04	$ 0.02	$ (0.06)	$ (0.02)	$ (0.11)	$ (0.07)	$ 0.19	$ (0.25)	$ 0.66
Diluted Net (loss) income per share (in dollars per share)	$ 0.06	$ 0.08	$ 0.04	$ 0.02	$ (0.06)	$ (0.02)	$ (0.11)	$ (0.07)	$ 0.19	$ (0.25)	$ 0.65
Aggregate antidilutive shares excluded from computation of diluted net (loss) income per share												7,800,000	10,600,000	3,900,000
Income taxes paid									$ 1,400,000	$ 900,000	$ 1,800,000