Assets [Abstract] ASSETS Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Liabilities and stockholders' equity Liabilities and Stockholders' Equity Stockholders' Equity Attributable to Parent Total stockholders' equity Retained Earnings (Accumulated Deficit) Retained earnings Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Treasury Stock Value Treasury stock: 14,757,799 and 13,366,476 common treasury shares at March 31, 2012 and June 30, 2011, respectively, at cost Additional Paid in Capital, Common Stock Additional paid-in capital Common Stock,Value, Issued Common Stock: $0.001 par value;120,000,000 shares authorized, 48,432,280 and 46,832,208 shares issued, and 33,674,481 and 33,465,732 shares outstanding, at March 31, 2012 and June 30, 2011, respectively LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Stockholders' Equity [Abstract] Other Liabilities, Noncurrent Other liabilities Total current liabilities Liabilities, Current Other Accrued Liabilities, Current Other accrued liabilities Income taxes payable Accrued Income Taxes, Current Employee-related Liabilities, Current Accrued compensation Accounts Payable, Current Accounts payable Total assets Assets Goodwill Goodwill Property, Plant and Equipment, Net Property and equipment at cost, net of accumulated depreciation of $35,785 and $29,443 at March 31, 2012 and June 30, 2011, respectively Assets, Current Total current assets Inventory, Net Total Inventories Inventories Accounts Receivable, Net, Current Accounts receivable, net of allowances of $503 at March 31, 2012 and $709 at June 30, 2011 Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and cash equivalents Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common Stock, Shares, Issued Common stock, shares issued Treasury Stock, Shares Common treasury shares Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts receivable Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, accumulated depreciation Accumulated depreciation and amortization Shares used in computing net income per share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted Average Number of Shares Outstanding, Diluted Shares, diluted Diluted Weighted Average Number of Shares Outstanding, Basic Basic Shares, basic Net Income Per Share [Abstract] Earnings Per Share, Basic Basic Earnings Per Share, Diluted Diluted Diluted Net Income (Loss) Attributable to Parent Net income Net income Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Income before provision for income taxes Impairment of Investments Impairment recovery on investments, net Impairment recovery of investments Impairment of investments, net Interest Expense Interest Expense Interest expense Interest income Investment Income, Interest Operating Income (Loss) Operating income Operating expenses: Operating Expenses [Abstract] Operating Expenses Total operating expenses Selling, General and Administrative Expense Selling, general, and administrative Research and Development Expense Research and development Gross margin Gross Profit Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Cash and Cash Equivalents, Period Increase (Decrease) Net increase in cash and cash equivalents Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Payroll Taxes for Deferred Stock Units Payroll taxes for deferred stock units Payroll taxes for deferred stock units Payroll taxes for deferred stock units. Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Proceeds from issuance of shares Payments for Repurchase of Common Stock Purchases of treasury stock Purchases of treasury stock Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Purchases of property and equipment Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Increase (Decrease) in Other Accrued Liabilities Other accrued liabilities Increase (Decrease) in Accrued Income Taxes Payable Income taxes payable Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Other Operating Assets Other assets Other assets Increase (Decrease) in Prepaid, Deferred Expense and Other Assets Prepaid expenses and other current assets Prepaid expenses and other current assets Increase (Decrease) in Inventories Inventories Inventories Increase (Decrease) in Accounts Receivable Accounts receivable, net Accounts receivable, net Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Document Fiscal Year Focus Document Fiscal Period Focus Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Net Income Per Share Earnings Per Share [Text Block] Share-Based Compensation [Abstract] Share-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Income Taxes Income Tax Disclosure [Text Block] Available-for-sale Securities, Noncurrent Non-current investments Cost of Goods and Services Sold Cost of revenue Sales Revenue, Net Net revenue Proceeds from Sales and Maturities of Non-current Investments Proceeds from sales and maturities of non-current investments Proceeds from sales and maturities of non-current investments. Income Taxes Paid, Net Cash paid for income taxes Convertible Subordinated Debt, Noncurrent Notes payable Common Stock, Shares, Outstanding Common stock, shares outstanding Increase (Decrease) in Employee Related Liabilities Accrued compensation Document and Entity Information [Abstract] Document and entity information. Money Market Funds [Member] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Changes in fair value of Level 3 financial assets Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Balance as of March 31, 2012 Balance as of June 30, 2011 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income Net unrealized gain Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 3 [Member] Customer B [Member] Customer B [Member] Customer B. Customer C [Member] Customer C [Member] Customer C. Schedule of Entity-Wide Revenue by Major Customers, by Reporting Segments [Table] Major Customers [Axis] Name of Major Customer [Domain] Entity-Wide Revenue, Major Customer [Line Items] Inventory, Raw Materials, Net of Reserves Raw material Inventory, Finished Goods, Net of Reserves Finished goods Available-for-sale Securities total Schedule of Available-for-sale Securities, Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Impairment recovery of redeemed investments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, Sales, Issuances, Settlements Redemptions Numerator [Abstract] Numerator: Numerator. Denominator [Abstract] Denominator: Denominator. Basic and Diluted Net Income Per Share [Abstract] Basic and diluted net income per share Basic and diluted net income per share. Incremental Common Shares Attributable to Share-based Payment Arrangements Effect of dilutive share-based awards Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Share-based awards Student Loans [Member] Student Loans [Member] Student loans. Municipals [Member] Municipals [Member] Auction Rate Securities (Textual) [Abstract] Auction rate securities. Auction Rate Securities (Textual) [Abstract] Preferred Stock [Member] Preferred Stock [Member] Investment Type [Axis] Income Taxes (Textual) [Abstract] Income Taxes (Textual) [Abstract] Income taxes. Unrecognized Tax Benefits Gross unrecognized tax benefits Unrecognized Tax Benefits, Period Increase (Decrease) Gross unrecognized tax benefits increased during the year Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Interest and penalties accrued related to unrecognized tax benefits Segment Reporting Information, Revenue Net Revenue Entity-Wide Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries Net revenue within foreign geographic areas Other Foreign Country [Member] Other foreign country. Other [Member] Segment Customers and Geographic Information (Textual) [Abstract] Segment customers and geographic information. Segment, Customers, and Geographic Information (Textual) [Abstract] Segment, Geographical [Domain] Cumulative Other than temporary Impairment Included in Retained earnings Cumulative Other than temporary Impairment Included in retained earnings Cumulative Other than temporary Impairment Included in Retained earnings. Auction Rate Securities with Fair Value Maturing within Specified Period Auction rate securities with fair value maturing within specified period. Auction Rate Securities with fair value maturing from 2015 to 2017 Auction Rate Securities with Fair Value Maturing from Stated Period Auction rate securities with fair value maturing from stated period. Auction Rate Securities with fair value maturing from 2040 to 2045 Auction Rate Securities at Investment Grade Auction rate securities at investment grade. ARS investments, investment grade Auction Rate Securities below Investment Grade Auction rate securities below investment grade. ARS investments, below investment grade Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Stock Compensation Plan [Member] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Failed Auction Rate Securities Investments [Abstract] Failed ARS investments Failed auction rate securities investments. Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Stock option awards, Balance at March 31, 2012 Stock option awards, Balance at June 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period Stock options awards, Granted Stock options awards, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Stock option awards, Forfeited Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Tax benefit realized from share-based compensation Tax benefit associated with share-based compensation Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Balance of Outstanding and Exercisable Stock Options [Abstract] Balance of outstanding and exercisable stock options. Balance of outstanding and exercisable stock options Weighted average exercise price, Balance at March 31, 2012 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Stock option awards, Exercisable at March 31, 2012 Weighted average exercise price, Exercisable at March 31, 2012 Deferred Stock Units [Member] Deferred stock units. Deferred Stock Units [Member] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Text Block] Share-based compensation and the related tax benefit recognized in consolidated statement of income Share-based Compensation, Allocation and Classification in Financial Statements [Abstract] Share-based compensation and the related tax benefit recognized in consolidated statement of income Aggregate intrinsic value of stock option awards, at March 31, 2012 Schedule of Share Based Compensation (Textual) [Abstract] Schedule of share based compensation. Schedule of Share Based Compensation (Textual) [Abstract] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Auction Rate Securities [Abstract] Auction rate securities. Auction Rate Securities [Text Block] Auction Rate Securities Auction rate securities. Stock unit awards outstanding, Balance at March 31, 2012 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Stock unit awards outstanding, Balance at June 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Stock unit awards, Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Stock unit awards, Delivered Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Stock unit awards, Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock option awards, Exercised Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Major customers as a percentage of net revenue Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Investment Type Categorization [Domain] Basic and diluted net income per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Balance of outstanding and exercisable stock options Net income per share: Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Other Assets, Noncurrent Other assets Auction Rate Securities [Member] Segment, Customers, and Geographic Information [Abstract] Available-for-sale Securities, Fair Value Disclosure Total available-for-sale securities Assets, Fair Value Disclosure [Abstract] Financial assets measured at fair value on a recurring basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value by Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Selling General and Administrative Expense [Member] Selling general and administrative expense. Selling General and Administrative [Member] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Statement, Geographical [Axis] Revenues from External Customers and Long-Lived Assets [Line Items] Credit Linked Notes [Member] Credit Linked Notes [Member] Credit Linked Notes. Cost of Sales [Member] Cost of revenue [Member] Research and Development Expense [Member] Research and Development [Member] Comprehensive Income (Loss) Note [Text Block] Comprehensive Income Inventory Disclosure [Text Block] Inventories Basis of Presentation [Abstract] Revenue Recognition [Text Block] Revenue recognition. Revenue Recognition Basis of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation Revenue Recognition [Abstract] Inventories [Abstract] Comprehensive Income [Abstract] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Financial assets and liabilities measured at fair value on a recurring basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Changes in fair value of Level 3 financial assets Schedule of Inventory, Current [Table Text Block] Inventories Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income Schedule of Comprehensive Income (Loss) [Table Text Block] Comprehensive Income Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax Net unrealized gain on available-for-sale Investments , net of tax Condensed Consolidated Balance Sheets [Abstract] Condensed Consolidated Statements of Income [Abstract] Income Tax Expense (Benefit) Provision for income taxes Condensed Consolidated Statements of Cash Flows [Abstract] Fair Value of Cash Equivalents and Investments [Abstract] Fair Value Disclosures [Text Block] Fair Value of Cash Equivalents and Investments Product Warranties, Indemnifications, and Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Product Warranties, Indemnifications, and Contingencies Effective Income Tax Rate, Continuing Operations Effective tax rate Major Customer Accounts Receivable as Percentage of Accounts Receivable [Table Text Block] Major customer accounts receivable as a percentage of accounts receivable Major customer accounts receivable as a percentage of accounts receivable. Auction Rate Securities Fair Value (Textual) [Abstract] Auction Rate Securities Fair Value (Textual) [Abstract] Failed Auction Rate Securities Investments [Table Text Block] Failed ARS investments Failed auction rate securities investments. Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Increase in Unrecognized tax benefit due to current year tax position Deferred Stock Unit [Member] Deferred stock unit. Deferred stock unit [Member] Stock Option [Member] Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost Effective tax rate, share based compensation CHINA [Member] China [Member] JAPAN [Member] Japan [Member] TAIWAN, PROVINCE OF CHINA [Member] Taiwan [Member] KOREA, REPUBLIC OF [Member] Korea [Member] Share Based Awards Not Included in Calculation of Diluted Net Income Per Share [Abstract] Share based awards, not included in calculation of diluted net income per share. Share based awards, not included in calculation of diluted net income per share Investment Securities at Original Cost Basis Investment Securities at Original Cost Basis Investment Securities at Original Cost Basis. Investment Securities at New Cost Basis Investment Securities at New Cost Basis Investment Securities at New Cost Basis. Aggregate Intrinsic Value Aggregate Intrinsic Value, Balance at March 31, 2012 Aggregate intrinsic value. Percentage Range of Net Revenue Percentage range of net revenue. Percentage range of net revenue Percentage of Net Revenue Percentage of net revenue. Percentage of net revenue Major Customers as Percentage of Accounts Receivable [Abstract] Major customers as percentage of accounts Receivable Major customers as percentage of accounts receivable. As Percentage of Accounts Receivables As a percentage of Accounts receivables As a percentage of accounts receivables. As Percentage of Accounts Receivable Range As a percentage of Accounts receivable Range As a percentage of accounts receivable range. Net Revenue within Geographic Areas Based on Customers Locations [Abstract] Net revenue within geographic areas based on customers locations Net revenue within geographic areas based on customers locations. Percentage from Personal Computer Market in Net Revenue Percentage from personal computer market in net revenue Percentage from personal computer market in net revenue. Major Customers as Percentage of Net Revenue [Abstract] Major customers as a percentage of net revenue Major customers as percentage of net revenue. Net Revenue within Geographic Areas Based on Customers Locations [Table Text Block] Net revenue within geographic areas based on customers locations Net revenue within geographic areas based on customers locations. Income Tax Disclosure [Abstract] Inventory, Net [Abstract] Contractual Maturity of Auction Rate Securities Investments Contractual maturity of ARS investment Contractual maturity of ARS investment. Asset Impairment Charges Impairment of property, and equipment Schedule of Share Based Compensation DSUs Activity [Table Text Block] Balance and aggregate intrinsic value of DSUs Schedule of share based compensation DSU's activity. Available for Sale Securities Unrealized Gain Loss from Temporary Impairment Unrealized Gain/(Loss) Available for sale securities unrealized gain/(loss) from temporary impairment. Segment Reporting Disclosure [Text Block] Segment, Customers, and Geographic Information Deferred Income Tax Expense (Benefit) Deferred taxes Depreciation, Depletion and Amortization Depreciation of property and equipment Use of Estimates [Policy Text Block] Use of Estimates Use of estimates. Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted average exercise price, Balance at June 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Shares Purchased Weighted Average Purchase Price Cash Received and Aggregate Intrinsic Value for ESPP [Abstract] Shares purchased weighted average purchase price cash received and the aggregate intrinsic value for ESPP Shares purchased weighted average purchase price cash received and the aggregate intrinsic value for ESPP. Share-based Compensation Arrangement by Share-based Payment Award, Shares Purchased for Award Shares purchased Proceeds from Stock Plans Cash received Aggregate Intrinsic Value for ESPP Aggregate intrinsic value for ESPP Aggregate intrinsic value for ESPP. Assets, Current [Abstract] Current assets : Liabilities, Current [Abstract] Current liabilities: Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity [Table Text Block] Shares purchased , weighted average purchase price, cash received and the aggregate intrinsic value for ESPP Share Based Compensation Arrangement by Share Based Payments Award Weighted Average Price Paid for Shares Purchased Weighted average purchase price Share based compensation arrangement by share based payment award weighted average price paid for shares purchased. Customer [Member] Customer A [Member] Customer A. Auction Rate Securities with Fair Value Having No Stated Maturity Auction rate securities with Fair value having no stated maturity. Auction rate securities with fair value having no stated maturity Earnings Per Share, Basic and Diluted [Abstract] Net income per share: Allocated Share-based Compensation Expense Total Share-based compensation costs Aggregate intrinsic value of stock option awards, Exercisable at March 31, 2012 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward] Balance and aggregate intrinsic value of DSUs Share Based Compensation Arrangement by Share Based Payment Award Intrinsic Value Closing Price Aggregate intrinsic value of stock option outstanding calculated using the closing price of common stock Share based compensation arrangement by share based payment award intrinsic value closing price. Adjustments Related to Tax Withholding for Share-based Compensation Shares valued withheld to meet statutory minimum tax withholding requirements Shares Paid for Tax Withholding for Share Based Compensation Shares withheld to meet statutory minimum tax withholding requirements Available for sale Securities Sold at Discount from Par ARS investments redeemed at discount from par Available for sale securities sold at discount from par. Available-for-sale Securities, Sold at Par ARS investments redeemed at par Minimum Period of Auction Rate Securities Investment in which Unrealized Loss Minimum period of Auction Rate Securities investment in which unrealized loss. Minimum Period of Auction Rate Securities investment in which unrealized loss Weighted Average Exercise Price Granted Weighted average exercise price, Granted Weighted average exercise price granted. Weighted Average Exercise Price Forfeited Weighted average exercise price, Forfeited Weighted average exercise price forfeited. Weighted Average Exercise Price Exercised Weighted average exercise price exercised. Weighted average exercise price, Exercised Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefit from share-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefit from share-based compensation Statement, Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Forecast [Member] Tax Benefit Realized from Share Based Compensation Tax benefit realized from share-based compensation Tax benefit realized from share based compensation. Closed end Municipal Funds [Member] Closed end municipal funds. Closed end municipal funds [Member] Potential Tax Liability Due to Disallowance of Certain Interest Deductions Potential tax liability due to disallowance of certain interest deductions. Potential tax liability due to disallowance of certain interest deductions