Equities Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Stock-Based Compensation Net cash (used in) provided by investing activities Capital expenditures for property and equipment Capital expenditures for property and equipment Accrued expenses {1} Accrued expenses Selling, general and administrative Common Stock, Shares Outstanding Accounts payable Fair Value, Hierarchy Statement {1} Statement Long-term Debt, Type {1} Long-term Debt, Type Available-for-sale Securities {1} Available-for-sale Securities Depreciation Foreign currency translation net of taxes of $0 in all periods Current liabilities: Entity Well-known Seasoned Issuer Schedule of Inventory, Current CASH FLOWS FROM OPERATING ACTIVITIES: Unrealized gain (loss) on investments tax adjustment Common Stock, Par Value TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Document Type Long-term Debt, Gross Effect of exchange rate changes on cash CASH FLOWS FROM INVESTING ACTIVITIES: Goodwill Inventories Total Entity Central Index Key Measurement Frequency Warranty Reserve Prepaid expenses and other current assets Prepaid expenses and other current assets Common stock - $.01 par value; authorized - 50,000 shares; issued - June 30, 2013, 3,728 shares and December 31, 2012, 3,703 shares Total current liabilities Accounts & other receivables - net Fair Value, Inputs, Level 1 Raw materials Fair Value Measurements Notes Payable {1} Notes Payable Repayment of notes payable Repayment of notes payable Tax benefit attributable to exercise of stock options (Gain) loss on investments (Gain) loss on investments Other comprehensive income: Income Statement Other intangible assets Total current assets Entity Voluntary Filers Entity Public Float Fair Value, Measurement Frequency Inventories {1} Inventories Stock-based compensation expense Unrealized gain (loss) on investments net of taxes of $2, $(3), $4 and $3 Income before provision for income taxes Sales, net Accrued expenses Other current assets Document Fiscal Period Focus Entity Filer Category Debt Instrument, Description of Variable Rate Basis Long-term Debt, Type Allocated Share-based Compensation Expense Basis of Presentation Deferred revenue Deferred income taxes {1} Deferred income taxes Common Stock, Shares Authorized Total stockholders' equity Deferred tax liability - intangible assets Investments, available-for-sale Cash {1} Cash CASH AT BEGINNING OF PERIOD CASH AT END OF PERIOD Entity Current Reporting Status Document and Entity Information: Fair Value, Measurements, Recurring Realized loss from securities included in beginning balance Finished goods Subsequent Events Investments {1} Investments Net cash provided by operating activities Accounts receivable - trade Accounts receivable - trade Adjustments to reconcile net income to net cash provided by operating activities: Preferred Stock, Shares Authorized LIABILITIES AND STOCKHOLDERS' EQUITY Amendment Flag Notes Payment of dividends Payment of dividends Proceeds from issuance of common stock - options Purchases of investments Earnings per common share (basic) Net income Other income (expense) TOTAL ASSETS Other intangible assets - net Property and equipment - net ASSETS Document Fiscal Year Focus Document Period End Date Fair Value, Measurements, Fair Value Hierarchy Available-for-sale Securities, Gross Unrealized Gain (Loss) Debt Instrument, Face Amount JP Morgan Chase Bank NA (Chase) Note Cash paid during the period for income taxes CASH FLOWS FROM FINANCING ACTIVITIES: Other liability Earnings per common share (diluted) Retained earnings Notes payable Entity Registrant Name Deferred income taxes on unrealized holding (gain) loss Inventories {2} Inventories Net cash provided by (used in) financing activities Accrued interest and other receivables Accrued interest and other receivables (Gain)/Loss on disposal of assets Shares outstanding (basic) Provision for income taxes Research and development Additional paid-in capital Current assets: NET INCREASE IN CASH Common stock purchased and retired Statement of Cash Flows Total comprehensive income Cost of goods sold Preferred Stock, Shares Outstanding Deferred income taxes Other long term liabilities Entity Common Stock, Shares Outstanding Current Fiscal Year End Date Fair Value, Inputs, Level 2 JP Morgan Chase London Branch Note Tables/Schedules Capital expenditures for intangible assets Capital expenditures for intangible assets TOTAL LIABILITIES Current portion of notes payable Other intangible assets - accumulated amortization Other intangible assets - accumulated amortization Fair Value, Inputs, Level 3 Debt Instrument, Basis Spread on Variable Rate Details Proceeds from sale of investments Operating expense: Preferred Stock, Shares Issued Stockholders' equity: Debt Instrument, Description Statement Payment of taxes for exchange of stock options This element represents the total of the cash outflow during the period for taxes related to exchanges of stock options. Total adjustments Changes in operating assets and liabilities: Foreign currency translation tax adjustment Operating income Total operating expense Common Stock, Shares Issued Accumulated other comprehensive loss Preferred stock - $.01 par value; authorized - 5,000 shares; no shares issued or outstanding Statement of Financial Position Work-in-process Cash paid during the period for interest Accounts payable {1} Accounts payable Provision for (recovery of) losses on accounts receivable Amortization Shares outstanding (diluted) Gross profit Preferred Stock, Par Value