Income Taxes	3 Months Ended
Mar. 29, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company accounts for income taxes under the provisions of ASC 740, Accounting for Income Taxes. The Company adjusts its effective tax rate each quarter to be consistent with the estimated annual effective tax rate. The Company also records the tax effect of unusual or infrequently occurring discrete items, including changes in judgment about valuation allowances and effects of changes in tax laws or tax rates, in the interim period in which they occur. The Company's effective tax rate reflects the impact of a portion of its earnings being taxed in foreign jurisdictions as well as a valuation allowance maintained on certain deferred tax assets. The Company recorded a tax provision of $0.6 million and a tax benefit of $4.2 million for the three month periods ended March 29, 2014 and March 30, 2013, respectively. The change during the three months ended March 29, 2014, compared to the corresponding periods in 2013, was primarily related to the profitability of the Company during the three months ended March 29, 2014, as well as a one-time benefit of $0.6 million recorded during the three month period ended March 30, 2013 related to the retroactive reinstatement of the 2012 Federal R&D tax credit. As of March 29, 2014, the Company continued to maintain a valuation allowance against certain net deferred tax assets as a result of uncertainties regarding the realization of the asset due to cumulative losses and uncertainty of future taxable income in various tax jurisdictions. In the event that the Company determines that the deferred tax assets are realizable, an adjustment to the valuation allowance will be reflected in the tax provision for the period such determination is made. The Company is subject to taxation in the U.S. and various states including California, and foreign jurisdictions including South Korea, Japan and United Kingdom. Due to tax attribute carry-forwards, the Company is subject to examination for tax years from 2003 forward for U.S. tax purposes. The Company is also subject to examination in various states for tax years from 2002 forward. The Company is subject to examination for tax years from 2006 forward for various foreign jurisdictions. On September 13, 2013, the U.S. Treasury Department and the IRS issued final regulations that address costs incurred in acquiring, producing, or improving tangible property (the "tangible property regulations"). The tangible property regulations are generally effective for tax years beginning on or after January 1, 2014, and may be adopted in earlier years. The tangible property regulations required the Company to make additional tax accounting method changes as of January 1, 2014. The impact of these changes was not material to the Company’s consolidated financial position or its results of operations. The Company accrues interest and penalties related to unrecognized tax benefits in its provision for income taxes. The total amount of accrued penalties and interest was immaterial for the three month period ended March 29, 2014. During the next twelve months, the Company anticipates increases in its unrecognized tax benefits of approximately $0.3 million.

Income Taxes

The Company accounts for income taxes under the provisions of ASC 740, Accounting for Income Taxes. The Company adjusts its effective tax rate each quarter to be consistent with the estimated annual effective tax rate. The Company also records the tax effect of unusual or infrequently occurring discrete items, including changes in judgment about valuation allowances and effects of changes in tax laws or tax rates, in the interim period in which they occur. The Company's effective tax rate reflects the impact of a portion of its earnings being taxed in foreign jurisdictions as well as a valuation allowance maintained on certain deferred tax assets.

The Company recorded a tax provision of $0.6 million and a tax benefit of $4.2 million for the three month periods ended March 29, 2014 and March 30, 2013, respectively. The change during the three months ended March 29, 2014, compared to the corresponding periods in 2013, was primarily related to the profitability of the Company during the three months ended March 29, 2014, as well as a one-time benefit of $0.6 million recorded during the three month period ended March 30, 2013 related to the retroactive reinstatement of the 2012 Federal R&D tax credit.

As of March 29, 2014, the Company continued to maintain a valuation allowance against certain net deferred tax assets as a result of uncertainties regarding the realization of the asset due to cumulative losses and uncertainty of future taxable income in various tax jurisdictions. In the event that the Company determines that the deferred tax assets are realizable, an adjustment to the valuation allowance will be reflected in the tax provision for the period such determination is made.

The Company is subject to taxation in the U.S. and various states including California, and foreign jurisdictions including South Korea, Japan and United Kingdom. Due to tax attribute carry-forwards, the Company is subject to examination for tax years from 2003 forward for U.S. tax purposes. The Company is also subject to examination in various states for tax years from 2002 forward. The Company is subject to examination for tax years from 2006 forward for various foreign jurisdictions.

On September 13, 2013, the U.S. Treasury Department and the IRS issued final regulations that address costs incurred in acquiring, producing, or improving tangible property (the "tangible property regulations"). The tangible property regulations are generally effective for tax years beginning on or after January 1, 2014, and may be adopted in earlier years. The tangible property regulations required the Company to make additional tax accounting method changes as of January 1, 2014. The impact of these changes was not material to the Company’s consolidated financial position or its results of operations.

The Company accrues interest and penalties related to unrecognized tax benefits in its provision for income taxes. The total amount of accrued penalties and interest was immaterial for the three month period ended March 29, 2014. During the next twelve months, the Company anticipates increases in its unrecognized tax benefits of approximately $0.3 million.