Accounts Receivable, Net, Current Trade accounts receivable, net Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Additional Paid in Capital, Common Stock Additional paid-in capital Amortization of Intangible Assets Amortization of trademark CONSOLIDATED BALANCE SHEETS Capital Lease Obligations, Current Current portion of debt Cash and Cash Equivalents, at Carrying Value CASH AND CASH EQUIVALENTS, beginning of year CASH AND CASH EQUIVALENTS, end of year Cash and cash equivalents Interest Paid Interest Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Accrued Income Taxes Payable Income taxes payable Increase (Decrease) in Inventories Inventories Increase (Decrease) in Prepaid, Deferred Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Operating Capital [Abstract] Effect on cash of changes in operating assets and liabilities: Increase (Decrease) in Accounts Payable Accounts payable Increase (Decrease) in Accrued Liabilities Accrued liabilities Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Outstanding Common stock, shares outstanding Common Stock, Value, Issued Common stock - $0.005 par value; 120,000 shares authorized; 98,731 shares issued and 88,980 outstanding as of December 31, 2010; 97,285 shares issued and 88,159 outstanding as of December 31, 2009 Comprehensive Income Note [Text Block] ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Cost of Goods Sold COST OF SALES Liabilities, Current [Abstract] CURRENT LIABILITIES: Liabilities, Current Total current liabilities Short-term Debt [Text Block] DEBT Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Tax Assets, Net, Current Deferred income taxes Deferred Tax Assets, Net, Noncurrent DEFERRED INCOME TAXES Deferred Revenue, Noncurrent DEFERRED REVENUE Earnings Per Share, Diluted Diluted (in dollars per share) Effect of Exchange Rate on Cash and Cash Equivalents Effect of exchange rate changes on cash and cash equivalents Share-based Compensation Stock-based compensation Gain (Loss) on Sale of Property Plant Equipment Loss (gain) on disposal of property and equipment Gross Profit GROSS PROFIT Impairment of Investments Loss on investments, net Loss on investments and put option, net (Note 3) CONSOLIDATED STATEMENTS OF INCOME Income Tax Disclosure [Text Block] INCOME TAXES Intangible Assets, Net (Excluding Goodwill) INTANGIBLES, net Inventory, Net Inventories Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] INVESTMENTS Liabilities and Stockholders' Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Stockholders' Equity. Total Liabilities and Stockholders' Equity Long-term Investments INVESTMENTS Net Cash Provided by (Used in) Financing Activities [Abstract] CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities 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 Net cash provided by (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 Net cash provided by operating activities Cash and Cash Equivalents, Period Increase (Decrease) NET INCREASE IN CASH AND CASH EQUIVALENTS Nonoperating Income (Expense) [Abstract] OTHER INCOME (EXPENSE): Nonoperating Income (Expense) Total other income (expense) Operating Income (Loss) OPERATING INCOME Other Comprehensive Income (Loss), Net of Tax [Abstract] Other comprehensive income (loss): Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Change in unrealized loss on available-for-sale securities, net of tax Change in unrealized gain (loss) on available-for-sale securities, net of tax Payments for (Proceeds from) Other Investing Activities (Increase) Decrease in other assets Pension and Other Postretirement Benefits Disclosure [Text Block] EMPLOYEE BENEFIT PLAN Prepaid Taxes Prepaid income taxes Proceeds from Sale and Maturity of Held-to-maturity Securities Maturities of held-to-maturity investments Proceeds from Issuance of Common Stock Issuance of common stock Proceeds from Sale of Available-for-sale Securities Sales of available-for-sale investments Proceeds from Sale of Property, Plant, and Equipment Proceeds from sale of property and equipment Property, Plant and Equipment, Net PROPERTY AND EQUIPMENT, net Provision for Doubtful Accounts Provision (benefit) for doubtful accounts Payments to Acquire Available-for-sale Securities Purchases of available-for-sale investments Payments to Acquire Held-to-maturity Securities Purchases of held-to-maturity investments Payments to Acquire Intangible Assets Additions to trademarks Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Related Party Transactions Disclosure [Text Block] RELATED-PARTY TRANSACTIONS Repayments of Short-term Debt Principal payments on debt Payments for Repurchase of Common Stock Purchases of common stock held in treasury Retained Earnings (Accumulated Deficit) Retained earnings Sales Revenue, Goods, Net NET SALES Inventory Disclosure [Text Block] INVENTORIES Segment Reporting Disclosure [Text Block] SEGMENT INFORMATION Short-term Investments Short-term investments CONSOLIDATED STATEMENTS OF CASH FLOWS CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Supplemental Cash Flow Information [Abstract] SUPPLEMENTAL INFORMATION: Income Taxes Paid Income taxes Assets, Current [Abstract] CURRENT ASSETS: Assets, Current Total current assets Treasury stock Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Common stock Property, Plant and Equipment Disclosure [Text Block] PROPERTY AND EQUIPMENT, Net Assets. Total Assets Intangible Assets Disclosure [Text Block] INTANGIBLES, Net Disclosure of Compensation Related Costs, Share-based Payments [Text Block] STOCK-BASED COMPENSATION Statement [Table] Assets [Abstract] ASSETS Statement [Line Items] Statement Fair Value, by Balance Sheet Grouping [Text Block] FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES Quarterly Financial Information [Text Block] QUARTERLY FINANCIAL DATA (Unaudited) Treasury Stock, Value Common stock in treasury, at cost; 9,751 shares and 9,126 shares as of December 31, 2010 and 2009, respectively Earnings Per Share, Basic Basic (in dollars per share) Excess Tax Benefit from Share-based Compensation, Financing Activities Tax benefit from exercise of stock options Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Stockholders' Equity, Period Increase (Decrease) Excess Tax Benefit from Share-based Compensation, Operating Activities Tax benefit from exercise of stock options Schedule of Treasury Stock by Class [Text Block] TREASURY STOCK PURCHASE Common Stock, Shares, Issued Common stock, shares issued Increase (Decrease) in Deferred Revenue Deferred revenue Other Assets, Noncurrent OTHER ASSETS Operating Expenses OPERATING EXPENSES Earnings Per Share [Abstract] NET INCOME PER COMMON SHARE: 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 Common Stock, Par or Stated Value Per Share Common stock, par value (in dollars per share) Treasury Stock, Shares Common stock in treasury, shares Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation Foreign currency translation adjustments Income Tax Expense (Benefit) PROVISION FOR INCOME TAXES Statement, Equity Components [Axis] Additional Paid-in Capital Retained Earnings Accumulated Other Comprehensive Income (Loss) Equity Component [Domain] Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Stock Issued During Period, Shares, Stock Options Exercised Exercise of stock options (in shares) Treasury Stock, Shares, Acquired Repurchase of common stock (in shares) Stock Issued During Period, Shares, Period Increase (Decrease) Treasury Stock, Value, Acquired, Cost Method Repurchase of common stock Adjustments to Additional Paid in Capital, Tax Effect from Share-based Compensation Excess tax benefits from share based payment arrangements Shares, Issued Balance (in shares) Balance (in shares) Earnings Per Share [Text Block] EARNINGS PER SHARE Net Income (Loss), Including Portion Attributable to Noncontrolling Interest NET INCOME Net income Net income, as reported Weighted Average Number of Shares Outstanding, Diluted [Abstract] WEIGHTED AVERAGE NUMBER OF SHARES OF COMMON STOCK AND COMMON STOCK EQUIVALENTS: Accrued Income Taxes, Current Income taxes payable Depreciation, Depletion and Amortization Depreciation and amortization Comprehensive Income, Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] STOCKHOLDERS' EQUITY: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total stockholders' equity Balance Balance Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued liabilities Employee-related Liabilities, Current Accrued compensation 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: Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value Stock-based compensation ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization and Significant Accounting Policies and Recent Accounting Pronouncements Disclosure [Text Block] Description of the entire organization, consolidation, significant accounting policies, basis of presentation of financial statements' disclosure and recent accounting pronouncements. Distributor receivables Increase (Decrease) in Distributor Receivables The net change during the reporting period in amount due from parties with whom new or amended distribution agreements have been entered into with respect to the sale of the company's product. Accrued distributor terminations Increase (Decrease) in Accrued Distributor Terminations The net change during the reporting period in the aggregate amount of distributor terminations incurred but not yet paid. Prepaid expenses and other current assets Prepaid Expenses and Other Current Assets Sum of the amounts paid in advance for capitalized costs that will be expensed and other current assets. Document and Entity Information Cash paid during the year for: Cash Paid [Abstract] Interest and other income, net Interest and Other Income, Net Income derived from investments in debt securities and on cash and cash equivalents the earnings of which reflect the time value of money or transactions in which the payments are for the use or forbearance of money, including the foreign currency transaction gains and losses. Distributor receivables Distributor Receivables, Current The amount due from the parties with whom new or amended distribution agreement has been entered into, with respect to the sale of company's product. Accrued distributor terminations Accrued Distributor Terminations, Current The amount due to parties for the termination of distribution agreements. DISTRIBUTION AGREEMENTS Disclosure of Distribution Agreements [Text Block] This block of text may be used to disclose all or part of the information related to the distribution agreements entered into with certain distributors. Commitments and Contingencies. COMMITMENTS AND CONTINGENCIES (Note 9) SUPPLEMENTAL DISCLOSURE OF NON-CASH ITEMS Capital Lease Obligations Incurred Capital leases for the acquisition of promotional vehicles Capital Expenditures Incurred but Not yet Paid Accounts payable for equipment purchased Deferred Revenue, Current Deferred revenue Statement, Scenario [Axis] Scenario, Unspecified [Domain] Gain (Loss) on Put Option of Securities Gain on put option This element represents the gain or loss from the original recognition of the put option as well as subsequent changes in the fair market valuation at each subsequent balance sheet date. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES RECENT ACCOUNTING PRONOUNCEMENTS FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES INVESTMENTS INVENTORIES PROPERTY AND EQUIPMENT, Net INTANGIBLES, Net DISTRIBUTION AGREEMENTS COMMITMENTS AND CONTINGENCIES ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS). TREASURY STOCK PURCHASE STOCK-BASED COMPENSATION INCOME TAXES EARNINGS PER SHARE SEGMENT INFORMATION RELATED-PARTY TRANSACTIONS DEBT EMPLOYEE BENEFIT PLAN QUARTERLY FINANCIAL DATA (Unaudited) Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Text Block] RECENT ACCOUNTING PRONOUNCEMENTS Gain (Loss) on Investments and Put Option of Securities Gain (loss) on investments and put option, net EXTENSION This element represents the net realized gain or loss on investments sold and the gain or loss arising due to the acquisition and revaluation of the put option for the period. Loss on investments, net Gain (Loss) on Sale of Investments Prepaid income taxes Increase (Decrease) in Prepaid Income Taxes The net change during the reporting period in prepaid income taxes which represents payments made in advance for income and other taxes, which are charged against earnings within one year or the normal operating cycle if longer. Increase (Decrease) in Accrued Salaries Accrued compensation Proceeds from Sale of Short-term Investments Sales of trading investments Loss on investments and put option, net (Note 2) Impairment of Investments and Gain or Loss on Put Option This element represents the amount by which the carrying amount exceeds the fair value of the investment. The amount is charged to income if the decline in fair value is deemed to be other than temporary. This element also represents the gain or loss from the original recognition of the put option as well as subsequent changes in the fair market valuation at each subsequent balance sheet date. Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS