Organization and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 28, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Nature of Operations	Organization and Nature of Operations. The Company was incorporated in the State of Delaware on June 1, 1988. The Company designs, develops, markets and manufactures data storage solutions in a variety of form factors using its flash memory, controller, firmware and software technologies. The Company operates in one segment, flash memory storage products.
Basis of Presentation	Basis of Presentation. The Company’s fiscal year ends on the Sunday closest to December 31 and its fiscal quarters consist of 13 weeks. The third quarters of fiscal years 2014 and 2013 ended on September 28, 2014 and September 29, 2013, respectively. Certain prior period amounts have been reclassified in the footnotes to conform to current period presentation, including line items within non-current liabilities in Note 4, “Balance Sheet Information.” For accounting and disclosure purposes, the exchange rates of 109.23, 104.94 and 98.27 at September 28, 2014, December 29, 2013 and September 29, 2013, respectively, were used to convert Japanese yen to U.S. dollars. Throughout the Notes to Condensed Consolidated Financial Statements, unless otherwise indicated, references to Net income refer to Net income attributable to common stockholders.
Consolidation, Policy	Principles of Consolidation. The Condensed Consolidated Financial Statements include the accounts of the Company and its majority-owned subsidiaries. All intercompany balances and transactions have been eliminated. Non-controlling interest represents the minority shareholders’ proportionate share of the net assets and results of operations of the Company’s majority-owned subsidiaries. The Condensed Consolidated Financial Statements also include the results of companies acquired by the Company from the date of each acquisition.
Use of Estimates	Use of Estimates. The preparation of Condensed Consolidated Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the Condensed Consolidated Financial Statements and accompanying notes. The estimates and judgments affect the reported amounts of assets, liabilities, revenue, expenses and related disclosure of contingent liabilities. On an ongoing basis, the Company evaluates its estimates, including those related to customer programs and incentives, intellectual property claims, product returns, allowance for doubtful accounts, inventory valuation and related reserves, valuation and impairments of marketable securities and investments, valuation and impairments of goodwill and long-lived assets, income taxes, warranty obligations, restructurings, contingencies, share-based compensation and litigation. The Company bases its estimates on historical experience and on other assumptions that its management believes are reasonable under the circumstances. These estimates form the basis for making judgments about the carrying value of assets and liabilities when those values are not readily apparent from other sources. Actual results could materially differ from these estimates.

Disclosure of accounting policy regarding (1) the principles it follows in consolidating or combining the separate financial statements, including the principles followed in determining the inclusion or exclusion of subsidiaries or other entities in the consolidated or combined financial statements and (2) its treatment of interests (for example, common stock, a partnership interest or other means of exerting influence) in other entities, for example consolidation or use of the equity or cost methods of accounting. The accounting policy may also address the accounting treatment for intercompany accounts and transactions, noncontrolling interest, and the income statement treatment in consolidation for issuances of stock by a subsidiary.

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