Inventory Disclosure [Text Block] Net cash paid in acquisition Total current liabilities Other current assets Investments, Debt and Equity Securities Payment of dividends Inventories {1} Inventories Cost of goods sold Stockholders' equity: Statement [Table] Entity Common Stock, Shares Outstanding Business Combinations Equity Capital expenditures for property and equipment Amortization Total Operating Expense Income Statement Retained earnings Deferred tax liability - intangible assets ASSETS Entity Public Float Entity Current Reporting Status Entity Registrant Name Document and Entity Information Product Warranty Disclosure [Text Block] Inventory CASH FLOWS FROM FINANCING ACTIVITIES: Total adjustments Accounts payable {1} Accounts payable (Gain) loss on investments Statement of Cash Flows Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Compensation Related Costs, Share Based Payments Cash paid during the period for interest NET INCREASE (DECREASE) IN CASH Tax benefit attributable to exercise of stock options Capital expenditures for intangible assets (Gain) loss on disposal of assets Accumulated other comprehensive loss LIABILITIES AND STOCKHOLDERS' EQUITY Purchases of investments Provision for (recovery of) losses on accounts receivable Current portion of notes payable TOTAL ASSETS Other intangible assets Entity Voluntary Filers Net cash provided by (used in) financing activities Common stock purchased and retired Changes in operating assets and liabilities: Earnings per common share (diluted) Net income Other income (expense) Operating expense: Other intangible assets - net Statement of Financial Position Entity Central Index Key Amendment Flag Fair Value, Assets Measured on Recurring Basis [Table Text Block] Cash paid during the period for income taxes Net cash provided by (used in) investing activities Stock-based compensation expense Adjustments to reconcile net income to net cash provided by operating activities: Earnings per common shares (basic) Research and development Notes payable Accrued expenses Other intangible assets - accumulated amortization Property and equipment - net Investments, available-for-sale Cash {1} Cash CASH AT BEGINNING OF PERIOD CASH AT END OF PERIOD Current assets: Current Fiscal Year End Date Comprehensive Income (Loss) Note [Text Block] Other liability Provision for income taxes Deferred income taxes Accounts & other receivables - net Document Fiscal Period Focus Entity Filer Category Subsequent Events Commitment and Contingencies Accounts receivable - trade Income before provision for income taxes Gross profit Sales, net Subsequent Events [Text Block] Fair Value Measures and Disclosures Organization, Consolidation and Presentation of Financial Statements Repayments of note payable CASH FLOWS FROM INVESTING ACTIVITIES: Depreciation Additional paid-in capital Total current assets Debt Mergers, Acquisitions and Dispositions Disclosures [Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Deferred revenue Accrued interest and other receivables Shares outstanding - basic Operating income Accounts payable Prepaid expenses and other current assets Deferred income taxes {1} Deferred income taxes CASH FLOWS FROM OPERATING ACTIVITIES: Preferred stock - $.01 par value; authorized - 5,000 shares; no shares issued or outstanding Statement [Line Items] Document Fiscal Year Focus Debt Disclosure [Text Block] Effect of exchange rate changes on cash Proceeds from notes payable Accrued expenses {1} Accrued expenses Common stock - $.01 par value; authorized - 50,000 shares; issued - June 30, 2011, 3,635 shares and December 31, 2010, 3,619 shares Other long term liabilities Entity Well-known Seasoned Issuer Document Type Net cash provided by operating activities Shares outstanding - diluted Total stockholders' equity Inventories Proceeds from issuance of common stock - options Current liabilities: Gain (Loss) on Investments [Table Text Block] Proceeds from sale of investments Selling, general and administrative TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Total liabilities Goodwill Document Period End Date