Document and Entity Information [Abstract] Document and entity information. 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 Interim Condensed Consolidated Balance Sheets [Abstract] ASSETS Assets [Abstract] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at the end of the period Cash and cash equivalents at the beginning of the period Cash and cash equivalents Short term bank deposits Other Short-term Investments Marketable Securities, Current Marketable securities (see Note 3) Accounts Receivable, Net Trade receivables (net of allowance for doubtful accounts of $25 at both June 30, 2012 and December 31, 2011) Deferred Tax Assets, Net, Current Deferred tax assets Prepaid Expense and Other Assets Prepaid expenses and other accounts receivable Assets, Current Total current assets Long term bank deposit Other Long-term Investments Severance Pay Fund Noncurrent Severance pay fund Severance pay fund, noncurrent. Deferred Tax Assets, Net, Noncurrent Deferred tax assets Property, Plant and Equipment, Net Property and equipment, net Goodwill Goodwill Assets, Noncurrent Total long-term assets Assets Total assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Trade payables Accounts Payable, Trade, Current Deferred Revenue, Current Deferred revenues Other Accounts Payable and Accrued Liabilities Current Accrued expenses and other payables Accrued expenses and other payables. Deferred tax liabilities Deferred Tax Liabilities, Current Liabilities, Current Total current liabilities Long term liabilities: Liabilities, Noncurrent [Abstract] Accrued Severance Pay Noncurrent Accrued severance pay Accrued severance pay, noncurrent. Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Common Stock, Value, Issued Common Stock: $0.001 par value: 60,000,000 shares authorized; 22,538,937 and 23,543,746 shares issued and outstanding at June 30, 2012 and December 31, 2011, respectively Additional Paid in Capital, Common Stock Additional paid in-capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Retained Earnings (Accumulated Deficit) Retained earnings Stockholders' Equity Attributable to Parent Ending balance Beginning balance Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Allowance for doubtful accounts trade receivable Allowance for Doubtful Accounts Receivable 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 Common Stock, Shares, Outstanding Common stock, shares outstanding Interim Condensed Consolidated Statements of Operations [Abstract] Revenues: Revenues [Abstract] Licensing License and Services Revenue Royalty Revenue Royalties Other revenue Other Revenue, Net Revenues Total revenues Total revenues Cost of Revenue Cost of revenues Gross Profit Gross profit Operating expenses: Operating Expenses [Abstract] Research and Development Expense Research and development, net Selling and Marketing Expense Sales and marketing General and Administrative Expense General and administrative Operating Expenses Total operating expenses Operating Income (Loss) Operating income Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income before taxes on income Net Income (Loss) Attributable to Parent Net income Net income Earnings Per Share, Basic Basic net income per share Earnings Per Share, Diluted Diluted net income per share Weighted-average number of shares of Common Stock used in computation of net income per share (in thousands): Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted Average Number of Shares Outstanding, Basic Weighted-average common stock outstanding Basic Weighted Average Number of Shares Outstanding, Diluted Diluted weighted average common stock outstanding Diluted Interim Condensed Statements of Changes In Stockholders' Equity [Abstract] Statement [Table] Statement, Equity Components [Axis] Equity Component [Domain] Common stock Common Stock [Member] Additional paid-in capital Additional Paid-In Capital [Member] Treasury stock Treasury Stock [Member] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss) [Member] Retained earnings (accumulated deficit) Retained Earnings (Accumulated Deficit) [Member] Statement [Line Items] Shares, Issued Ending balance, shares Beginning balance, shares Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain from available-for-sale securities, net Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax Unrealized gain (loss) from hedging activities, net Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Equity-based compensation Tax benefit related to exercise of stock options Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Stock Issued During Period, Value, Employee Stock Ownership Plan Issuance of Common Stock upon exercise of stock options Issuance of Common Stock upon exercise of stock options, shares Stock Issued During Period, Shares, Employee Stock Ownership Plan Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of Common Stock under employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Issuance of Common Stock under employee stock purchase plan, shares Treasury Stock Value Acquired Weighted Average Method Purchase of Treasury Stock Purchase of treasury stock. Treasury Stock Issued During Period Value Stock Options Exercised Issuance of Treasury Stock upon exercise of stock options Issuance of treasury stock upon exercise of stock options. Treasury Stock Issued During Period Shares Stock Options Exercised Issuance of Treasury Stock upon exercise of stock options, shares Issuance of treasury stock upon exercise of stock options, shares. Interim Condensed Consolidated Statements of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments required 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] Depreciation Depreciation Share-based Compensation Equity-based compensation Gain (Loss) on Sale of Property Plant Equipment Gain from sale of property and equipment Amortization of premiums on available-for-sale marketable securities Investment Income, Amortization of Premium Foreign Currency Transaction Gain (Loss), Unrealized Unrealized foreign exchange loss (gain) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Decrease in trade receivables Increase (Decrease) in Accounts Receivable Increase (Decrease) in Prepaid Expenses and Other Accounts Receivable Decrease in prepaid expenses and other accounts receivable Increase (Decrease) in prepaid expenses and other accounts receivable. Increase (Decrease) in Deferred Tax Net Increase in deferred taxes, net Increase (Decrease) in deferred tax, net. Increase in trade payables Increase (Decrease) in Accounts Payable, Trade Increase (Decrease) in Deferred Revenue Increase (decrease) in deferred revenues Decrease in accrued expenses and other payables Increase (Decrease) in Other Accounts Payable and Accrued Liabilities Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefit from equity-based compensation Increase (Decrease) in Accrued Severance Pay Net Decrease in accrued severance pay, net Increase (Decrease) in accrued severance pay, net. Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Payments to Acquire Property, Plant, and Equipment Purchase of property and equipment Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of property and equipment Investment in Bank Deposits Investment in bank deposits Investment in bank deposits. Proceeds from Bank Deposits Proceeds from bank deposits Proceeds from bank deposits. Payments to Acquire Available-for-sale Securities Investment in available-for-sale marketable securities Proceeds from Maturity of Marketable Securities Proceeds from maturity of available-for-sale marketable securities Proceeds from maturity of available-for-sale marketable securities. Proceeds from Sale of Available-for-sale Securities Proceeds from sale of available-for-sale marketable securities Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Payments for Repurchase of Common Stock Purchase of Treasury Stock Proceeds from issuance of Common Stock upon exercise of stock options Proceeds from Stock Options Exercised Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefit from equity-based compensation Net Cash Provided by (Used in) Financing Activities Net cash provided by (used in) financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate movements on cash Increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Business [Abstract] Business. Business [Text Block] BUSINESS Business. Basis of Presentation and Summary of Significant Accounting Policies [Abstract] BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Marketable Securities [Abstract] MARKETABLE SECURITIES Marketable Securities [Text Block] Fair Value Measurement [Abstract] FAIR VALUE MEASUREMENT Fair Value Disclosures [Text Block] Geographic Information and Major Customer Data [Abstract] GEOGRAPHIC INFORMATION AND MAJOR CUSTOMER DATA Segment Reporting Disclosure [Text Block] Net Income Per Share of Common Stock [Abstract] NET INCOME PER SHARE OF COMMON STOCK Earnings Per Share [Text Block] Common Stock and Stock-Based Compensation Plans [Abstract] COMMON STOCK AND STOCK-BASED COMPENSATION PLANS Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Derivatives and Hedging Activities [Abstract] DERIVATIVES AND HEDGING ACTIVITIES Derivative Instruments and Hedging Activities Disclosure [Text Block] Recently Issued Accounting Standards [Abstract] Description of New Accounting Pronouncements Not yet Adopted [Text Block] RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS Assets, Current [Abstract] Current assets: Liabilities, Current [Abstract] Current liabilities: Certificates of Deposit [Member] Certificates of deposits [Member] Corporate Debt Securities [Member] Corporate bonds [Member] US Government Agencies Debt Securities [Member] Foreign government bond [Member] Available-for-sale Securities, Gross Unrealized Gain (Loss) [Abstract] Summary of Unrealized gain (loss) on investment Available-for-sale Matures Within One Year Gross Unrealized Gains Available-for-sale securities- matures within one year, Gross unrealized gains Available for sale matures within one year, gross unrealized gains. Available-for-sale Matures After One Year Through Three Years Gross Unrealized Gains Available-for-sale securities- matures after one year through three years, Gross unrealized gains Available for sale matures after one year through three years, gross unrealized gains. Available-for-sale Securities, Debt Maturities, Amortized Cost Basis Amortized cost, Total Available-for-sale Securities, Gross Unrealized Gains Gross unrealized gains, Total Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses Available-for-sale securities- matures within one year, Gross unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses Available-for-sale securities- matures after one year through three years, Gross unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Gross unrealized losses, Total Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Less than 12 months, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value 12 months or greater, Fair Value Marketable Securities (Textual) [Abstract] Marketable securities. Marketable Securities (Textual) [Abstract] Available-for-sale Securities, Gross Realized Gains Gross realized gain from sale of available for sale securities Available-for-sale Securities, Gross Realized Losses Gross realized loss from sale of available for sale securities Schedule of Available-for-sale Securities [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Schedule of Available-for-sale Securities [Line Items] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Level I [Member] Fair Value, Inputs, Level 2 [Member] Level II [Member] Fair Value, Inputs, Level 3 [Member] Level III [Member] Asset Class [Axis] Fair Value by Asset Class [Domain] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Available-for-sale Securities, Fair Value Disclosure Marketable securities Liabilities, Fair Value Disclosure [Abstract] Liabilities: Foreign Currency Contracts, Liability, Fair Value Disclosure Foreign exchange contracts Derivative Financial Instruments, Liabilities, Fair Value Disclosure Total liabilities Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Major customer data as a percentage of total revenues Segment, Geographical, Groups of Countries, Group One [Member] Europe and Middle East [Member] Segment, Geographical, Groups of Countries, Group Two [Member] Asia Pacific [Member] UNITED STATES United States [Member] GERMANY Germany [Member] SWITZERLAND Switzerland [Member] CHINA China [Member] Customer B [Member] Customer B [Member] Customer b. Customer C [Member] Customer C [Member] Customer c. Customer D [Member] Customer D [Member] Customer d. Segment Reporting Disclosure of Entity Wide Percentage of Revenues [Abstract] Major customer data as a percentage of total revenues Segment reporting disclosure of entity wide percentage of revenues. Entity-Wide Revenue, Major Customer, Percentage Percentage of total revenues Geographic Information and Major Customer Data (Textual) [Abstract] Geographic Information and Major Customer Data (Textual) [Abstract] Geographic information and major customer data. Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Segment, Geographical [Domain] Revenues from External Customers and Long-Lived Assets [Line Items] Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract] Summary information about geographic areas Schedule of Revenue by Major Customers, by Reporting Segments [Table] Major Customers [Axis] Name of Major Customer [Domain] Revenue, Major Customer [Line Items] Incremental Common Shares Attributable to Share-based Payment Arrangements Effect of stock options Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block] Calculation of Numerator and Denominator in Earnings Per Share Net Income (Loss) Attributable to Parent [Abstract] Numerator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Denominator: Net Income Per Share of Common Stock (Textual) [Abstract] Net Income Per Share of Common Stock (Textual) [Abstract] Net income per share of common stock. Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of stock option activity and related information Number of shares outstanding, Beginning balance Number of shares outstanding, Ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Number of shares, Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of shares, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Number of shares, Forfeited or expired Number of shares, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted-average exercise price, Ending Balance Weighted-average exercise price, Beginning Balance Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted-average exercise price, Granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-average exercise price, Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Weighted-average exercise price, Forfeited or expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted-average exercise price, Exercisable Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Equity-based compensation expense included in interim condensed consolidated statements of comprehensive income Allocated Share-based Compensation Expense Total equity-based compensation expense Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Summary of stock option activity and related information Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] 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] Cost of Sales [Member] Cost of revenue [Member] Research and Development Expense [Member] Research and development, net [Member] Selling and Marketing Expense [Member] Sales and marketing [Member] General and Administrative Expense [Member] General and administrative [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation, Allocation and Classification in Financial Statements [Abstract] Equity-based compensation expense included in interim condensed consolidated statements of comprehensive income Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Assumptions used to estimate stock options granted to employees Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield Expected volatility, Minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Risk-free interest rate, Minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Contractual term of up to Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Antidilutive shares excluded from computation of Earnings Per Share Expected volatility, Maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Risk-free interest rate, Maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Derivative Asset, Fair Value, Net Derivative assets Derivative Liability, Fair Value, Gross Liability Derivative liabilities Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location, by Derivative Instrument Risk [Table] Derivative Instrument Risk [Axis] Derivative Contract Type [Domain] Foreign Exchange Contract [Member] Foreign Exchange Option Contracts [Member] Foreign Exchange Forward [Member] Foreign Exchange Forward Contracts [Member] Derivative Instruments, Gain (Loss) [Line Items] Summary of Company's outstanding derivatives Derivative Asset, Fair Value, Net [Abstract] Summary of Derivative Instruments by Hedge Designation [Abstract] Reconciliation of Gain (Loss) by Hedging Instruments, by Income Statement Location Derivatives and Hedging Activities (Textual) [Abstract] Derivatives and Hedging Activities (Textual) [Abstract] Derivatives and hedging activities. Derivatives, Fair Value [Line Items] Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Summary of Unrealized gain (loss) on investment Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Summary information about geographic areas Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Assumptions used to estimate stock options granted to employees and non-employees directors Summary of Company's outstanding derivatives Schedule of Derivative Instruments [Table Text Block] Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block] Reconciliation of Gain (Loss) by Hedging Instruments, by Income Statement Location Available-for-sale Securities Debt Maturities Rolling Year Two Through Three Amortized Cost Basis Available-for-sale securities- matures after one year through three years, Amortized cost Available for sale securities debt maturities rolling year two through three amortized cost basis. Available-for-sale Securities Debt Maturities Rolling Year Two Through Three Fair Value Available-for-sale securities- matures after one year through three years, Fair value Available for sale securities debt maturities rolling year two through three fair value. Available-for-sale Securities, Debt Securities Fair value, Total Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Available-for-sale securities- matures within one year, Amortized cost Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Available-for-sale securities- matures within one year, Fair value Foreign Currency Contract, Asset, Fair Value Disclosure Foreign exchange contracts Number of Reportable Segments Number of reportable segment Percentage of Revenues Accounted by Major Customers Percentage of total revenues in each period Percentage of revenues accounted by major customers. Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Suboptimal Exercise Multiple Suboptimal exercise multiple (employees) Share based compensation arrangement by share based payment award fair value assumptions suboptimal exercise multiple. Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Unrecognized compensation expense related to unvested awards Cash Flow Hedging [Member] Cash Flow Hedging [Member] Not Designated as Hedging Instrument [Member] Not Designated as Hedging Instrument [Member] Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net Gain (loss) recognized in other comprehensive income (loss), effective portion, Net, Total Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Gain (loss) reclassified from accumulated OCI into income, effective portion, Net, Total Derivative, Notional Amount Notional principal amount of Hedging Contracts Derivative Instruments, Gain (Loss) Recognized in Income, Net Gain (loss) recognized in income, net Hedging Relationship [Axis] Hedging Relationship [Domain] Common Stock and Stock Based Compensation Plans (Textual) [Abstract] Common stock and stock-based compensation plans. Common Stock and Stock-Based Compensation Plans (Textual) [Abstract] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value Measured on a Recurring Basis Proceeds from Issuance of Common Stock Under Employee Stock Purchase Plan Proceeds from issuance of Common Stock under employee stock purchase plan Proceeds from issuance of common stock under employee stock purchase plan. Customer [Member] Customer A [Member] Customer. Other Assets, Noncurrent Investment in other company Treasury Stock, Value Treasury stock Investment Income, Net Financial income, net Treasury Stock, Shares Purchase of Treasury Stock, shares Accrued Interest on Bank Deposits Accrued interest on bank deposits Accrued interest on short term bank deposits. Proceeds From Issuance Of Treasury Stock Upon Exercise Of Stock Options Proceeds from issuance of Treasury Stock upon exercise of stock options Proceeds from issuance of treasury stock upon exercise of stock options. Assets, Fair Value Disclosure Total assets Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted-average remaining contractual term, Ending Balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted-average remaining contractual term, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate intrinsic value, Ending Balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Aggregate intrinsic value, Exercisable Share-based Compensation Arrangement By Share Based Payment Award, Fair Value Assumptions, Expected Forfeiture Expected forfeiture (employees) Share based compensation arrangement by share based payment award fair value assumptions, expected forfeiture. Share Repurchase Program [Abstract] Share repurchase program. Share Repurchase Program [Text Block] SHARE REPURCHASE PROGRAM Share repurchase program. Consolidation, Policy [Policy Text Block] Basis of Consolidation Unaudited Interim Financial Information [Policy Text Block] Unaudited interim financial information. Unaudited Interim Financial Information Use of Estimates, Policy [Policy Text Block] Use of Estimates Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract] Summary of gross unrealized losses and fair values on investments Share-based Compensation Arrangement By Share Based Payment Award, Fair Value Assumptions, Expected Forfeiture for Executives Expected forfeiture (executives) Share based compensation arrangement by share based payment award fair value assumptions expected forfeiture for executives. Share-based Compensation Arrangement By Share-based Payment Award, Fair Value Assumptions, Suboptimal Exercise Multiple for Executives Suboptimal exercise multiple (executives) Share based compensation arrangement by share based payment award fair value assumptions suboptimal exercise multiple for executives. Share Repurchase Program (Textual) [Abstract] Share Repurchase Program (Textual) [Abstract] Share repurchase program. Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block] Summary of gross unrealized losses and fair values on investments Grant of Purchase Rights Under Employee Stock Purchase Plan New Purchase rights under stock option plan Grant of purchase rights under employee stock purchase plan. Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Expected Weighted Average Period of Unrecognized Compensation Expense Stock Repurchase Program, Number of Shares Authorized to be Repurchased Common stock shares, authorized Stock Repurchased During Period, Shares Common stock shares, repurchased Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased Common stock shares, remaining authorized Treasury Stock Acquired, Average Cost Per Share Average Purchase Price of Common stock Stock Repurchased During Period, Value Aggregate purchase price JAPAN Japan [Member] KOREA, REPUBLIC OF S. Korea [Member] Customer E [Member] Customer e Customer E [Member] Customer F [Member] Customer f Customer F [Member] Comprehensive Income, Policy [Policy Text Block] Presentation of Comprehensive Income Taxes Payable, Current Income taxes payable, net Income Tax Expense (Benefit) Income taxes Available-for-sale Securities, Gross Realized Gain (Loss) Realized gain on sale of available-for-sale marketable securities Increase (Decrease) in Income Taxes Increase in income taxes payable Preferred Stock, Value, Issued Preferred Stock: $0.001 par value; 5,000,000 shares authorized; none issued and outstanding Preferred Stock, Par or Stated Value Per Share Preferred Stock, par value Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred stock, issued Preferred Stock, Shares Outstanding Preferred stock, shares outstanding