Accounting Policies [Abstract] Accounting Policies [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Other Accrued Liabilities Accounts Payable, Current Accounts payable Accounts Receivable [Member] Accounts Receivable [Member] Accounts Receivable, Net, Current Accounts receivable, net of allowances of $1,165 and $883 at December 31, 2014 and June 30, 2014, respectively Accretion on investment securities. Accretion On Investment Securities Investment securities accretion Accrued Income Taxes, Current Income taxes payable Accrued liabilities for inventory purchase. Accrued Liabilities For Inventory Purchase Inventory obligations Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, accumulated depreciation Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Additional Paid in Capital, Common Stock Additional paid-in capital Amortization Acquired intangibles amortization Adjustments Related to Tax Withholding for Share-based Compensation Shares valued withheld to meet statutory minimum tax withholding requirements Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Allocated Share-based Compensation Expense Share-based compensation costs Total Allowance for Doubtful Accounts Receivable, Current Allowance for doubtful accounts receivable Amendment Flag Amendment Flag Amortization of Financing Costs Amortization of debt issuance costs Amortization of Intangible Assets Acquired intangibles amortization Amortized Cost and Fair Value Debt Securities [Abstract] Amortized Cost and Fair Value Debt Securities [Abstract] Amortized Cost and Fair Value Debt Securities [Abstract] Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Common shares that were not included in computation of diluted net income per share Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Assets Total assets Assets, Current Total current assets Assets, Current [Abstract] Current Assets: 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 Auction rate securities investments. Auction Rate Securities Investments Table [Text Block] ARS Investments Auction rate securities maturing year of specified amount one. Auction Rate Securities Maturing Year Of Specified Amount One Maturity period one Auction Rate Securities [Member] Auction Rate Securities [Member] 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 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 2016 to 2018 Available-for-sale Securities Fair Value Total available-for-sale securities Available-for-sale Securities, Accumulated Gross Unrealized Gain (Loss), before Tax Unrealized Gain/(Loss) Available-for-sale Securities, Amortized Cost Basis New Cost Basis Available-for-sale Securities, Debt Securities, Current Current Portion of Investments Available-for-sale Securities, Sold at Par ARS investments redeemed at par Award Type [Axis] Award Type [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Base Rate [Member] Base Rate [Member] Basis of Presentation and Significant Accounting Policies [Text Block] Basis of Presentation Bridge Loan [Member] Bridge Loan [Member] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition Contingent Consideration Business Acquisition Contingent Consideration Indemnification hold back Business Acquisition Contingent Consideration At Fair Value Working Capital Adjustment Business Acquisition Contingent Consideration At Fair Value Working Capital Adjustment Working capital hold back Business Acquisition, Effective Date of Acquisition Acquisition closing effective date Business Acquisition [Line Items] Business Acquisition [Line Items] Business Acquisition, Percentage of Voting Interests Acquired Outstanding capital stock Business Acquisition, Pro Forma Earnings Per Share, Diluted Net income per share - diluted Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table Text Block] Pro Forma Adjustments Used to Arrive at Pro Forma Net Income Business Acquisition, Pro Forma Information [Table Text Block] Summary of Financial Information Presents Combined Results of Operations for Acquisition Business Acquisition, Pro Forma Net Income (Loss) Net income Business Acquisition, Pro Forma Revenue Revenue Business Combination, Consideration Transferred Fair value of the consideration transferred totaled Business combination contingent additional consideration transferred. Business Combination Contingent Additional Consideration Transferred Additional purchase price consideration Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability Accretion and remeasurement of contingent consideration liability Change in contingent consideration Business combination contingent consideration arrangements contingent consideration obligation to former shareholders of acquiree. Business Combination Contingent Consideration Arrangements Contingent Consideration Obligation To Former Shareholders Of Acquiree Additional consideration paid to former stockholders based on sales of products, due Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High Additional consideration Business Combination, Contingent Consideration, Liability, Noncurrent Acquisition-related liabilities Business Combination Disclosure [Text Block] Acquisition Business Combination, Liabilities Arising from Contingencies, Amount Recognized Contingent consideration liabilities recorded for business combinations Business combination pro forma information adjustment. Business Combination Pro Forma Information Adjustment Total Business combination pro forma information amortization of debt issuance costs. Business Combination Pro Forma Information Amortization Of Debt Issuance Costs Adjustments Amortization of debt issuance costs Business combination pro forma information amortization of intangible assets adjustment. Business Combination Pro Forma Information Amortization Of Intangible Assets Adjustment Intangible amortization Business combination pro forma information cost of acquired buyer transaction costs. Business Combination Pro Forma Information Cost Of Acquired Buyer Transaction Costs Buyer transaction costs Business combination pro forma information income tax adjustment. Business Combination Pro Forma Information Income Tax Adjustment Income tax adjustment Business Combination Pro Forma Information Interest Expense Adjustments Business Combination Pro Forma Information Interest Expense Adjustments Interest expense Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Total identifiable assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents Cash Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities Acquisition-related liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable Accounts payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Other accrued liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets, Current Current deferred tax asset Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities Net Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Deferred Tax Liabilities Net Deferred tax liability Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Income Tax Payable Current Business Combination Recognized Identifiable Assets Acquired and Liabilities Assumed Income Tax Payable Current Income taxes payable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles Acquired intangible assets Intangible assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory Inventory Inventory purchase obligation settled Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Net identifiable assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets Other assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment Property and equipment Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Short Term Investments Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Short Term Investments Short-term deposit Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Net assets acquired Business Combinations [Abstract] Business Combinations [Abstract] Capital Expenditures Incurred but Not yet Paid Property and equipment received but unpaid 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 Cash and Cash Equivalents, Period Increase (Decrease) Net increase/(decrease) in cash and cash equivalents Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Non-cash investing and financing activities: CHINA China [Member] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments Contingencies and Guarantees [Text Block] Product Warranties, Indemnifications, and Contingencies Common stock issued for contingent consideration. Common Stock Issued For Contingent Consideration Common stock issued in settlement of contingent consideration liability Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock: $0.001 par value; 120,000,000 shares authorized, 56,997,204 and 55,911,513 shares issued, and 36,662,018 and 36,863,802 shares outstanding, at December 31, 2014 and June 30, 2014, respectively Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Other comprehensive income: Comprehensive Income (Loss) Note [Text Block] Comprehensive Income Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk, Percentage Accounts receivable major customer percentage Percentage of net revenue Concentration Risk Type [Domain] Concentration Risk Type [Domain] Cost of Goods and Services Sold Cost of revenue Cost of Sales [Member] Cost of Revenue [Member] Credit Concentration Risk [Member] Credit Concentration Risk [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Credit linked notes. Credit Linked Notes [Member] Credit Linked Notes [Member] Cumulative other than temporary impairment included in retained earnings. Cumulative Other Than Temporary Impairment Included In Retained Earnings Other-than- temporary Impairment in Retained Earnings Current Fiscal Year End Date Current Fiscal Year End Date Customer A. Customer A [Member] Customer A [Member] Customer B. Customer B [Member] Customer B [Member] Customer C. Customer C [Member] Customer C [Member] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Customer D [Member] Customer D [Member] Customer D [Member] Customer E [Member] Customer E [Member] Customer E [Member] Customer obligation. Customer Obligation Customer obligations Customer Relationships [Member] Customer Relationships [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Disclosure [Text Block] Debt Debt Instrument Amortization Period Debt Instrument Amortization Period Debt amortization period Debt Instrument, Basis Spread on Variable Rate Basis spread on variable rate Debt Instrument, Covenant Description Operating covenant description Debt Instrument, Description of Variable Rate Basis Description of Base Rate Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Periodic Payment, Principal Quarterly principal payment Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Issuance Cost Debt issuance cost Deferred stock units. Deferred Stock Units [Member] Deferred Stock Units Outstanding [Member] Deferred Tax Liabilities, Net, Noncurrent Deferred tax liability Depreciation, Depletion and Amortization Depreciation and amortization Developed Technology Rights [Member] Developed Technology [Member] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share-Based Compensation Discount Rates Applied To Estimated Cash Flows For All Intangible Assets Acquired Discount Rates Applied To Estimated Cash Flows For All Intangible Assets Acquired Identified intangible assets included discount rates Display Driver Developed Technology [Member] Display Driver Developed Technology [Member] Display Driver Developed Technology [Member] Document and entity information. Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Earnings Per Share [Abstract] Net income per share: Earnings Per Share, Basic Basic Earnings Per Share, Basic and Diluted [Abstract] Net income per share: Earnings Per Share, Diluted Diluted Earnings Per Share Reconciliation [Abstract] Numerator: Earnings Per Share [Text Block] Net Income Per Share Effective Income Tax Rate Reconciliation, Percent Effective tax rate Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash and cash equivalents Employee-related Liabilities, Current Accrued compensation Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Unrecognized share-based compensation, period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Unrecognized share-based compensation cost Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Income tax benefit on share-based compensation Employee Stock Option [Member] Employee Stock Option [Member] An employee stock purchase plan which allows employees to designate a portion of their base compensation, subject to legal restrictions and limitations, to purchase shares of common stock at 85% of the lesser of the FMV at the beginning of the offering period or the exercise date. The offering period extends for up to two years and includes four exercise dates occurring at six-month intervals. If the FMV at an exercise date is less than the FMV at the beginning of the offering period, the current offering period will terminate and a new two-year offering period will commence. Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity [Domain] Entity [Domain] Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Equity [Abstract] Equity [Abstract] Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefit from share-based compensation Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Summary of Provisional Amounts Recorded for Estimated Fair Values of Assets Acquired and Liabilities Assumed as of Acquisition Date Fair Value, Assets Measured on Recurring Basis [Table Text Block] Financial Assets and Liabilities Measured at Fair Value on Recurring Basis Asset Class [Domain] Asset Class [Domain] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Changes in Fair Value of Level 3 Financial Assets Asset Class [Axis] Asset Class [Axis] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Line Items] Fair Value Disclosures [Line Items] Fair Value Disclosures [Line Items] Fair Value Disclosures [Table] Fair Value Disclosures [Table] Fair Value Disclosures [Table] Fair Value Disclosures [Text Block] Fair Value Fair Value, Inputs, Level 1 [Member] Level 1 [Member] Fair Value, Inputs, Level 3 [Member] Level 3 [Member] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Changes in Fair Value of Level 3 Contingent Consideration Liability Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair value measurements transfers into or out of level one. Fair Value Measurements Transfers Into Or Out Of Level One Transfer amount of assets or liabilities of level one Fair value measurements transfers into or out of level three. Fair Value Measurements Transfers Into Or Out Of Level Three Transfer amount of assets or liabilities of level three Fair value measurements transfers into or out of level two. Fair Value Measurements Transfers into or Out of Level Two Transfer amount of assets or liabilities of level two Fair value measurement with unobservable inputs reconciliation recurring basis accretion and remeasurement. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Accretion And Remeasurement Accretion and remeasurement Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Other Comprehensive Income (Loss) Net gain Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) Redemptions Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Ending balance Beginning balance Fair value measurement with unobservable inputs reconciliation recurring basis liabilities cash settlements. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liabilities Cash Settlements Cash settlement of contingent consideration liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements Issuance of common stock in settlement of liability Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Ending balance Beginning balance Federal Funds Effective Swap Rate [Member] Federal Funds Effective Swap Rate [Member] Finger print developed technology. Finger Print Developed Technology [Member] Fingerprint Developed Technology [Member] Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization Finite Lived Intangible Assets Amortization Expense After Year Six Finite Lived Intangible Assets Amortization Expense After Year Six Thereafter Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months Remainder of 2015 Finite-Lived Intangible Assets, Amortization Expense, Year Five 2019 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2018 Finite Lived Intangible Assets Amortization Expense Year Six Finite Lived Intangible Assets Amortization Expense Year Six 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2016 Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite lived intangible assets future amortization expense for period of time yet to be determined. Finite Lived Intangible Assets Future Amortization Expense For Period Of Time Yet To Be Determined To be determined Finite-Lived Intangible Assets, Gross Intangible assets Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Net Acquired intangibles, net Acquired intangibles, net Finite-Lived Intangible Asset, Useful Life Finite lived intangible assets weighted average useful life Useful Life First four quarters. First Four Quarters [Member] First Four Quarters [Member] Foreign Currency Exchange Rate, Translation Foreign currency exchange rate (Japanese yen to U.S. dollar) Foreign Currency Transaction Gain (Loss), before Tax Foreign currency remeasurement gain Foreign Currency Transaction Gain (Loss), Realized Net gain on foreign currency transactions, which primarily related to recent acquisition Foreign Currency Transactions and Translations Policy [Policy Text Block] Foreign Currency Transaction Gains and Losses Goodwill Goodwill Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Acquired Intangibles Gross Profit Gross margin Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income before provision for income taxes Income Statement [Abstract] Income Statement [Abstract] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Income Taxes Paid, Net Cash paid for taxes Income Tax Expense (Benefit) Provision for income taxes Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accounts Receivable Accounts receivable, net Increase (Decrease) in Income Taxes Payable Income taxes payable Increase (Decrease) in Deferred Income Taxes Deferred taxes Increase (Decrease) in Employee Related Liabilities Accrued compensation Increase (Decrease) in Inventories Inventories Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities, net of acquisitions: Increase (Decrease) in Other Accrued Liabilities Other accrued liabilities Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase in unrecognized tax benefits income tax penalties and interest accrued. Increase In Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued Increase in interest and penalties accrued related to unrecognized tax benefits Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Effect of dilutive share-based awards In Process Research and Development [Member] In-Process Research and Development [Member] Interest and Other Income Interest and other income, net Interest Expense Interest expense Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Inventory Disclosure [Text Block] Inventories Inventory, Finished Goods, Net of Reserves Finished goods Inventory, Net Inventories Total Inventories Inventory, Raw Materials, Net of Reserves Raw materials Investment impairment recovery. Investment Impairment Recovery Impairment recovery on investments Investments, All Other Investments [Abstract] Investments, All Other Investments [Abstract] Investments and Other Noncurrent Assets [Text Block] Non-current Investments Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Investment securities at original cost basis. Investment Securities At Original Cost Basis Original Cost Basis Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] JAPAN Japan [Member] KOREA, REPUBLIC OF South Korea [Member] Legal Entity [Axis] Legal Entity [Axis] Letter of Credit [Member] Letter of Credit [Member] Liabilities Total liabilities Liabilities and Equity Liabilities and stockholders' equity Liabilities, Current Total current liabilities Liabilities, Current [Abstract] Current Liabilities: Licensed technology. Licensed Technology [Member] Licensed Technology and Other [Member] Long-term Line of Credit Amount borrowed under revolving credit facility Line of credit facility allowable requests for additional borrowing. Line Of Credit Facility Allowable Requests For Additional Borrowing Increase in Line of credit facility Line of Credit Facility, Current Borrowing Capacity Amount borrowed under revolving credit facility Line of Credit Facility, Date of First Required Payment Quarterly payment beginning period Line of Credit Facility, Expiration Date Revolving credit facility maturity period Amount of the final principal payment made at the maturity of the credit facility. Line Of Credit Facility Final Principal Payment Final principal payment Line of Credit Facility, Frequency of Payments Description of periodic payments Line of Credit Facility, Maximum Borrowing Capacity Line of credit facility amount Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commitment fee percentage of unused portion London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Long-term Debt, Current Maturities Current portion of long-term debt Long-term Debt, Excluding Current Maturities Long-term debt, net of issuance costs Major customer accounts receivable as a percentage of accounts receivable. Major Customer Accounts Receivable As Percentage Of Accounts Receivable Table [Text Block] Major Customer Accounts Receivable as Percentage of Accounts Receivable Customer [Axis] Customer [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Market stock units. Market Stock Units [Member] Market Stock Units Outstanding [Member] Maximum [Member] Maximum [Member] Minimum [Member] Minimum [Member] Minimum warranty period of products. Minimum Warranty Period Of Products Minimum warranty period of products Mobile product applications. Mobile Product Applications [Member] Mobile Product Applications [Member] Money Market Funds [Member] Money Market Funds [Member] Municipal Bonds [Member] Municipals [Member] Customer [Domain] Customer [Domain] Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by/(used in) financing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Income (Loss) Attributable to Parent Net income Net income Next fourteen quarters. Next Fourteen Quarters [Member] Next Fourteen Quarters [Member] Number of Operating Segments Number of operating segments Number of product categories. Number Of Product Categories Number of product Operating Expenses Total operating expenses Operating Expenses [Abstract] Operating expenses: Operating Income (Loss) Operating income Operating income Order or Production Backlog [Member] Backlog [Member] Other Accrued Liabilities, Current Other accrued liabilities Other accrued liabilities Other Assets, Noncurrent Non-current other assets Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Net current-period other comprehensive income/(loss) Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Change in unrealized net gain on investments Other foreign country. Other Foreign Country [Member] Other [Member] Other Liabilities, Noncurrent Other long-term liabilities Other Noncash Income Non-cash interest income Other Sundry Liabilities, Current Other Pacinian. Pacinian [Member] Pacinian [Member] Patents [Member] Patents [Member] Payables and Accruals [Abstract] Payables and Accruals [Abstract] Payments for Repurchase of Common Stock Purchases of treasury stock Payments of Debt Issuance Costs Payment of debt issuance costs Payments to Acquire Businesses, Gross Initial purchase price of acquisition Payments to Acquire Businesses, Net of Cash Acquired Acquisition of business, net of cash acquired Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payroll taxes for deferred stock units. Payroll Taxes For Deferred Stock Units Payroll taxes for deferred stock units Pc product applications. PC Product Applications [Member] PC Product Applications [Member] Percentage of potential payout. Percentage Of Potential Payout Potential payout range Percentage of voting capital stock of certain foreign subsidiaries collateralized. Percentage Of Voting Capital Stock Of Certain Foreign Subsidiaries Collateralized Percentage of voting capital stock Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Potential payout adjustment ratio. Potential payout adjustment ratio Potential payout adjustment ratio Preferred Stock [Member] Preferred Stock [Member] Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Prepaid Expenses and Other Current Assets [Member] Prepaid Expenses and Other Current Assets [Member] Proceeds from Issuance of Long-term Debt Proceeds from issuance of long-term debt Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Proceeds from issuance of shares Proceeds from (Payments for) Other Financing Activities Payment of contingent consideration Proceeds from Sale, Maturity and Collection of Investments Proceeds from sales of non-current investments Proceeds from Stock Plans Cash received Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Product Warranty Accrual, Current Warranty Property, Plant and Equipment, Net Property and equipment at cost, net of accumulated depreciation of $59,916 and $49,482 at December 31, 2014 and June 30, 2014, respectively Range [Axis] Range [Axis] Range [Domain] Range [Domain] Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Reclassification from accumulated other comprehensive income to interest income for accretion of non-current investments Renesas Electronics Corporation [Member] Renesas Electronics Corporation [Member] Renesas Electronics Corporation [Member] RenesasSpDriversInc [Member] RenesasSpDriversInc [Member] Renesas SP Drivers Inc [Member] Research and Development Expense Research and development Research and Development Expense [Member] Research and Development [Member] Retained Earnings (Accumulated Deficit) Retained earnings Revenue from External Customers by Geographic Areas [Table Text Block] Net Revenue within Geographic Areas Based on Customers' Locations The entire disclosure for revenue recognition. 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Share Based Compensation Arrangement by Share Based Payment Award Award Vesting Period Tranche One Vesting period, tranche one Share based compensation arrangement share based payment award, award vesting period tranche three. Share Based Compensation Arrangement by Share Based Payment Award Award Vesting Period Tranche Three Vesting period, tranche three Share based compensation arrangement by share based payment award award vesting period tranche two. Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period Tranche Two Vesting period, tranche two Share based compensation arrangement by share based payment award equity instruments other than options adjustments for performance results attained. 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