Document and entity information. Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Voluntary Filers Consolidated Balance Sheets [Abstract] Assets [Abstract] ASSETS Cash and Cash Equivalents, at Carrying Value CASH AND CASH EQUIVALENTS, END OF YEAR CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Short-term Investments Short-term investments Short-term Investments, Total Accounts, Notes, Loans and Financing Receivable, Net, Current Notes and accounts receivable, net Accounts, Notes, Loans and Financing Receivable, Net, Current, Total Inventory, Net Inventories Inventory, Net, Total Restricted Cash and Investments, Current Restricted assets-current Restricted Cash and Investments, Current, Total Deferred Tax Assets, Net, Current Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred income tax assets, net Deferred Tax Assets, Net, Current, Total Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current, Total Assets, Current Total current assets Long-term Investments Long-term investments Long-term Investments, Total Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property and equipment, net Property, Plant and Equipment, Net, Total Deferred Tax Assets, Net, Noncurrent Deferred income tax assets, net Deferred Tax Assets, Net, Noncurrent, Total Goodwill Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill Goodwill, Total Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Intangible Assets, Net (Excluding Goodwill), Total Other Assets Other assets Other Assets, Total Assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND SHAREHOLDERS' EQUITY Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received. Notes and Accounts Payable Notes and accounts payable Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, 10% tax imposed on earnings not distributed in prior years and exclude payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Income Tax Payable Income tax payable Recognize the refundable government grants as current portion of long-term payable which dued within one year. Current Portion of Long-Term Payable Current portion of long-term payable Accounts Payable and Other Accrued Liabilities, Current Accrued expenses and other current liabilities Liabilities, Current Total current liabilities Recognize the refundable government grants as the long-term payable which were paid after one year. Long-Term Payable, Net of Current Portion Long-term payable, net of current portion Other Liabilities, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent, Total Liabilities Total liabilities Commitments and Contingencies Commitments and Contingencies (Note 17) Stockholders' Equity Attributable to Parent [Abstract] Shareholders' Equity Common Stock, Value, Issued Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Ordinary Shares at US$ 0.01 par value per share Authorized: 500,000 thousand shares Issued and outstanding: 117,139 thousand shares in 2010 and 124,572 thousand shares in 2011 Common Stock, Value, Issued, Total Additional Paid in Capital Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional paid-in capital Additional Paid in Capital, Total Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated deficit) Retained Earnings (Accumulated Deficit), Total Stockholders' Equity Attributable to Parent Balance Balance Ordinary Shares at US$ 0.01 par value per share Authorized: 500,000,000 shares Issued and outstanding: 112,277,892 shares in 2009 and 117,139,068 shares in 2010 Total shareholders' equity Liabilities and Equity Total liabilities and shareholders' equity Common Stock, Par or Stated Value Per Share Ordinary Shares, Par Value Common Stock, Shares Authorized Ordinary Shares, Authorized Common Stock, Shares, Issued Ordinary Shares, Issued Common Stock, Shares, Issued, Total Common Stock, Shares, Outstanding Common Stock, Shares, Outstanding, Ending Balance Common Stock, Shares, Outstanding, Beginning Balance Ordinary Shares, Outstanding Consolidated Statements Of Income [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Repurchase Of Equity [Member] American Depositary Shares [Member] Revenue, Net NET SALES Revenue, Net, Total Cost of Goods Sold COST OF SALES Cost of Goods Sold, Total Gross Profit Gross profit GROSS PROFIT Operating Expenses [Abstract] OPERATING EXPENSES Operating expenses: Research and Development Expense Research and development, net Research and development Research and Development Expense, Total Selling and Marketing Expense Selling and marketing Sales and marketing Selling and Marketing Expense, Total General and Administrative Expense General and administrative General and administrative General and Administrative Expense, Total Amortization of Intangible Assets Amortization of intangible assets Amortization of Intangible Assets, Total Amortization of intangible assets Gain (Loss) Related to Litigation Settlement Gain from settlement of litigation Gain from settlement of litigation Gain (Loss) Related to Litigation Settlement, Total Asset Impairment Charges Impairment of goodwill and long-lived assets Asset Impairment Charges, Total Impairment of goodwill and long-lived assets Operating Expenses Total operating expenses Total operating expenses Total operating expenses Operating Income (Loss) Loss from operations OPERATING INCOME (LOSS) Nonoperating Income (Expense) NON-OPERATING INCOME (EXPENSES) Gain (Loss) on Sale of Other Investments Gain on sales of short-term investments Gain on sales of short-term investments Gain on sales of short-term investments Investment Income, Dividend Dividend income Investment Income, Interest Interest income Foreign Currency Transaction Gain (Loss), before Tax Foreign exchange (gain) loss Foreign exchange gain (loss), net Foreign Currency Transaction Gain (Loss), before Tax, Total Impairment of Long-Lived Assets to be Disposed of Impairment of long-term investments Impairment of long-term investments Other than Temporary Impairment Losses, Investments, Total Interest Expense Interest expense Interest expense Interest Expense, Total Other Nonoperating Income (Expense) Other income (loss), net Other Nonoperating Income (Expense), Total Other Nonrecurring (Income) Expense Other income (expense) total Total non-operating income (loss) Income (loss) before income taxes (benefit) INCOME (LOSS) BEFORE INCOME TAX INCOME (LOSS) BEFORE INCOME TAX Income (loss) before income taxes Income Tax Expense (Benefit) Income tax expense INCOME TAX EXPENSE (BENEFIT) Income Tax Expense (Benefit) Net income (loss) Net income (loss) Net loss Net income (loss) NET INCOME (LOSS) Net income Earnings Per Share Amounts [Abstract] EARNINGS (LOSS) PER ORDINARY SHARE: Earnings per common share: Earnings Per Share, Basic Basic Earnings Per Share, Basic, Total Earnings Per Share, Diluted Diluted Earnings Per Share, Diluted, Total Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] WEIGHTED AVERAGE ORDINARY SHARES OUTSTANDING Weighted Average Number of Shares Outstanding, Basic Basic (Thousands) Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number of Shares Outstanding, Diluted Diluted (Thousands) Weighted Average Number of Shares Outstanding, Diluted, Total Consolidated Statements Of Changes In Shareholders' Equity And Comprehensive Income (Loss) [Abstract] Shares, Issued Balance, shares Balance, shares Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax Deferred pension gain (loss) Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Total Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income (loss) Allocated Share-based Compensation Expense Stock-based compensation expenses Stock-based compensation expenses Allocated Share-based Compensation Expense, Total Issuance of ordinary shares employee stock options and restricted stocks. Issuance of Ordinary Shares Employee Stock Options and Restricted Stocks Issuance of ordinary shares upon exercise of employee stock options and restricted stock units Issuance of ordinary shares employee stock options and restricted stocks, shares. Issuance of Ordinary Shares Employee Stock Options and Restricted Stocks, Shares Issuance of ordinary shares upon exercise of employee stock options and restricted stock units, shares Treasury Stock, Retired, Cost Method, Amount Treasury stock retired Treasury stock retired Adjustments to Additional Paid in Capital, Other Transfer of additional paid-in capital to eliminate accumulated deficit from prior years Consolidated Statements Of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Depreciation, Depletion and Amortization, Total Share Based Compensation, Share-based compensation expense Share-based Compensation, Total Stock-based compensation Gain (Loss) on Sale of Property Plant Equipment Loss on disposal of property and equipment Gain on sales of short-term investments Gain (Loss) on Sale of Property Plant Equipment, Total Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Income Tax Expense (Benefit), Total Increase (Decrease) in Deferred Rent Receivables Deferred rent Deferred rent Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Trading Securities Short-term investments Short-term investments Increase (Decrease) in Trading Securities, Total Increase (Decrease) in Accounts and Notes Receivable Notes and accounts receivable Notes and accounts receivable Increase Decrease In Inventories Inventories Inventories Increase (Decrease) in Inventories, Total Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets, Total Increase (Decrease) in Other Operating Assets Other assets Other assets Increase (Decrease) in Other Operating Assets, Total The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received. Increase Decrease in Notes and Accounts Payable Notes and accounts payable Increase (Decrease) in Accounts Payable and Accrued Liabilities Accrued expenses and other current liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Increase (Decrease) in Accrued Taxes Payable Income tax payable Increase (Decrease) in Accrued Taxes Payable, Total Increase (Decrease) in Other Operating Liabilities Other liabilities Increase (Decrease) in Other Operating Liabilities, Total NET CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES Net cash provided by (used in) operating activities NET CASH (USED FOR) PROVIDED BY OPERATING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] CASH FLOWS FROM INVESTING ACTIVITIES Return of capital from long-term investments. Proceeds From (Repayments Of) Return Of Capital From Long-Term Investments Return of capital from long-term investments Payments to Acquire Businesses, Net of Cash Acquired Business acquisition-net of cash and cash equivalents acquired Business acquisition-net of cash and cash equivalents acquired Payments to Acquire Businesses, Net of Cash Acquired, Total Payments to Acquire Property, Plant, and Equipment Purchase of property and equipment Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment, Total Increase decrease in restricted assets. Increase Decrease in Restricted Assets Changes in restricted assets Proceeds from Sale of Property, Plant, and Equipment Proceeds from disposal of property and equipment Proceeds from Sale of Property, Plant, and Equipment, Total Proceeds from disposal of property and equipment NET CASH USED FOR INVESTING ACTIVITIES Net cash used in investing activities NET CASH (USED FOR) PROVIDED BY INVESTING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES Proceeds from Stock Options Exercised Proceeds from exercise of share options Proceeds from issuance of ordinary shares upon exercise of employee stock options Proceed from government grants. Proceed From Government Grants Proceed from government grants Proceeds from Issuance of Long-term Debt and Capital Securities, Net Proceeds from Issuance of Long-term Debt and Capital Securities, Net, Total Proceeds from long-term debt and payable Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Repayment of long-term debt and payable Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities, Total Repayment of long-term debt and payable Net Cash Provided by (Used in) Financing Activities, Total Net cash provided by financing activities NET CASH PROVIDED BY (USED FOR) FINANCING ACTIVITIES Cash and Cash Equivalents, Period Increase (Decrease), Total NET INCREASE (DECREASE) IN CASH NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS Effect of exchange rate changes on cash and cash equivalents Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents, Total EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS Supplemental Cash Flow Elements [Abstract] SUPPLEMENTAL INFORMATION Stock Issued During Period, Value, Stock Options Exercised Exercise of stock option in lieu of offsetting accrued bonuses Interest Paid Interest paid Interest Paid, Total Income Taxes Paid Income taxes paid Organization And Operations [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Organization And Operations Summary Of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary Of Significant Accounting Policies US dollar amounts. US Dollar Amounts [Abstract] US dollar amounts. US Dollar Amounts Disclosure [Text Block] US Dollar Amounts Business Acquisition [Abstract] Business Combination Disclosure [Text Block] Business Acquisition Cash [Abstract] Cash and Cash Equivalents Disclosure [Text Block] Cash Short-Term Investments [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Short-Term Investments Notes And Accounts Receivable [Abstract] Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Notes And Accounts Receivable Inventories [Abstract] Inventory Disclosure [Text Block] Inventories Long-Term Investments [Abstract] Long-term investments are accounted for under the cost method of accounting and evaluates related information (e.g., budgets, business plans, financial statements, etc.) in determining whether an, other than temporary decline in value exists. Long-Term Investments Disclosure [Text Block] Long-Term Investments Properties And Equipment [Abstract] Property, Plant and Equipment Disclosure [Text Block] Properties And Equipment Goodwill And Acquired Intangible Assets [Abstract] Goodwill and Intangible Assets Disclosure [Text Block] Goodwill And Acquired Intangible Assets Accrued Expenses And Other Current Liabilities [Abstract] Accounts Payable, Accrued Liabilities, and Other Liabilities Disclosure, Current [Text Block] Accrued Expenses And Other Current Liabilities Pension Plan [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] Pension Plan Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Shareholders' Equity [Abstract] Stockholders' Equity Note Disclosure [Text Block] Shareholders' Equity Equity Incentive Plan [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Equity Incentive Plan Commitments And Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments And Contingencies Segment Information [Abstract] Segment Reporting Disclosure [Text Block] Segment Information Fair Value Measurement [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurement Statement, Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Ordinary Share [Member] Additional Paid In Capital [Member] Additional Paid- In Capital [Member] Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) [Member] Retained Earnings [Member] Retained Earnings (Accumulated Deficit) [Member] Treasury Stock [Member] Treasury Stock [Member]