Revenue Recognition Revenue Recognition Disclosure [Text Block] Disclosure of the entity's accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction should be disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to the recognition of revenue. The disclosure may also indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction. Cooperative reimbursements from vendors Cooperative reimbursements from vendors Supplier Rebates and Price Protection Disclosure [Text Block] This element represents the entire disclosure related to vendor rebates and price protection, which are recorded when earned as a reduction to cost of sales or merchandise inventory, as applicable. Cooperative reimbursements from vendors, which are earned and available, are recorded during the period in which the related advertising expenditure is incurred. Major customers Revenue by Major Customers by Reporting Segments Disclosure [Text Block] Major customers Disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of the entity's revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. Document and Entity Information Amendment Description Amendment Flag Current Fiscal Year End Date Accounts Receivable, Net, Current Accounts receivable, net of allowances of $1,513 and $1,473 in 2011 and 2010, respectively Accounts Receivable, Net, Noncurrent Accounts receivable-long-term Document Period End Date Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Document Type Additional Paid in Capital, Common Stock Additional paid-in capital Payments to Acquire Productive Assets Purchase of equipment and leasehold improvements Amortization expense Amortization Depreciation expense Depreciation Allowance for Doubtful Accounts Receivable, Current Accounts receivable, allowances (in dollars) Consolidated Balance Sheets Earnings Per Share, Basic Income per common share-Basic (in dollars per share) Capital Lease Obligations, Current Current portion - capital lease obligation Capital Lease Obligations, Noncurrent Long- term portion- capital lease obligation Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Inventories Inventory Increase (Decrease) in Prepaid Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Common Stock, Shares Authorized Common Stock, shares authorized Common Stock, Shares, Issued Common Stock, shares issued Common Stock, Shares, Outstanding Common Stock, shares outstanding Common Stock, Value, Issued Common Stock, $.01 par value; 10,000,000 shares authorized; 5,284,500 shares issued; and 4,679,878 and 4,770,241 shares outstanding in 2011 and 2010, respectively Comprehensive Income (Loss) Note [Text Block] Comprehensive Income Cost of Revenue Cost of sales Liabilities, Current Total current liabilities Liabilities, Current [Abstract] Current liabilities: Deferred Income Tax Expense (Benefit) Deferred income tax expense Deferred Tax Assets, Net, Current Deferred income taxes Earnings Per Share, Diluted Income per common share-Diluted (in dollars per share) Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of foreign exchange rate on cash Share-based Compensation Share-based compensation expense Foreign Currency Disclosure [Text Block] Foreign Currency Translation Gross Profit Gross profit Consolidated Statements of Earnings Income Tax Disclosure [Text Block] Income Taxes Inventory, Net Inventory, net Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Marketable securities Liabilities Total liabilities Liabilities and Equity Total liabilities and stockholders' equity Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Marketable Securities, Current Marketable securities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net Income (Loss) Available to Common Stockholders, Basic Net income Net income New Accounting pronouncements Other income: Nonoperating Income (Expense) [Abstract] Operating Income (Loss) Income from operations Revenues Net sales Increase (Decrease) in Other Operating Assets and Liabilities, Net Net change in other operating assets and liabilities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain (loss) on available-for-sale securities Payments of Dividends, Common Stock Dividends paid Purchase of treasury stock Proceeds from Sale of Treasury Stock Proceeds from Sale of Available-for-sale Securities Redemptions of available-for-sale securities Proceeds from Stock Options Exercised Proceeds from stock option exercises Property, Plant and Equipment, Net Equipment and leasehold improvements, net Provision for Doubtful Accounts Provision for doubtful accounts receivable Payments to Acquire Available-for-sale Securities Purchase of available-for-sale securities Repayments of Long-term Capital Lease Obligations Repayment of capital lease obligations Payments for Repurchase of Common Stock Purchase of treasury stock Retained Earnings (Accumulated Deficit) Retained earnings Schedule II-Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Industry, Segment and Geographic Information Selling, General and Administrative Expense Selling, general and administrative expenses Consolidated Statements of Cash Flows Consolidated Statements of Stockholders' Equity and Comprehensive Income Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Comprehensive Income Supplemental Cash Flow Information [Abstract] Supplementary disclosure of cash flow information: Excess Tax Benefit from Share-based Compensation, Financing Activities Tax benefit (expense) from share- based compensation Income Taxes Paid Income taxes paid Assets, Current Total current assets Assets, Current [Abstract] Current assets: Treasury Stock [Member] Treasury Reversal of uncertain tax position liability Unrecognized Tax Benefits, Period Increase (Decrease) Weighted Average Number of Shares Outstanding, Diluted Weighted average common shares outstanding-Diluted (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted average common shares outstanding-Basic (in shares) Common Stock [Member] Common Stock Assets Total assets Deferred Tax Assets, Net, Noncurrent Deferred income taxes Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stockholders' Equity and Stock Based Compensation Scenario, Unspecified [Domain] Statement [Table] Statement, Scenario [Axis] Assets [Abstract] Assets Statement [Line Items] Statement Capital Lease Obligations Incurred Equipment financed with capital lease Fair Value Disclosures [Text Block] Fair Value Measurements Quarterly Results of Operations (Unaudited) Quarterly Financial Information [Text Block] Cash flows provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Cash flows used in financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Treasury Stock, Value Treasury stock, at cost, 604,622 and 514,259 shares in 2011 and 2010, respectively Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity Stockholders' Equity, Period Increase (Decrease) Other Assets, Noncurrent Other assets Earnings Per Share Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, 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 Treasury stock, shares Stockholders' Equity Attributable to Parent Total stockholders' equity Balance Balance Income Tax Expense (Benefit) Provision for income taxes Provision for income taxes Foreign Currency Transaction Gain (Loss), before Tax Foreign currency transaction gain Common Stock, Dividends, Per Share, Cash Paid Dividends paid per common share (in dollars per share) Statement, Equity Components [Axis] Additional Paid-in Capital [Member] Additional Paid-In Capital Retained Earnings [Member] Retained Earnings (Deficit) Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Other Comprehensive Income Equity Component [Domain] Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Restricted stock grants (net of forfeitures) Stock Issued During Period, Value, Stock Options Exercised Stock options exercised Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Restricted stock grants (net of forfeitures) (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Stock options exercised (in shares) Treasury Stock, Shares, Acquired Treasury shares repurchased (in shares) Stock Issued During Period, Shares, Period Increase (Decrease) Comprehensive Income [Member] Comprehensive Income Treasury Stock, Value, Acquired, Cost Method Treasury shares repurchased Shares, Issued Balance (in shares) Balance (in shares) Earnings Per Share [Text Block] Earnings Per Share Depreciation, Depletion and Amortization Depreciation and amortization Commitments and Contingencies Commitments and Contingencies Dividends, Common Stock, Cash Dividends paid 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: Accounts Payable and Accrued Liabilities, Current Accounts payable and accrued expenses Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Translation adjustment Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share-based compensation expense Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Basis of Presentation Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Description of New Accounting Pronouncements Not yet Adopted [Text Block] New Accounting pronouncements Net Cash Provided by (Used in) Continuing Operations Net increase (decrease) in cash and cash equivalents Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net Tax benefit (expense) from share-based compensation Balance Sheet Detail Interest Income (Expense), Nonoperating, Net Interest income Basis of Presentation Marketable securities Commitments and Contingencies. Income Taxes Fair Value Measurements Quarterly Results of Operations (Unaudited) Stockholders' Equity and Stock Based Compensation Summary of Significant Accounting Policies Industry, Segment and Geographic Information Foreign Currency Translation Schedule II-Valuation and Qualifying Accounts Supplemental Balance Sheet Disclosures [Text Block] Balance Sheet Detail Revenue Recognition Gain on disposal of fixed assets Gain (Loss) on Sale of Property Plant Equipment Description of Business Nature of Operations [Text Block] Description of Business Summary of Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Defined Contribution Plan Defined Contribution Plan Pension and Other Postretirement Benefits Disclosure [Text Block]