Condensed Consolidated Balance Sheets (Unaudited) Condensed Consolidated Balance Sheets (Unaudited) [Abstract] Current Assets: Current Assets: [Abstract] Cash and cash equivalents Accounts receivable Inventories Prepaid and other current assets Deferred tax assets Total Current Assets Property, Plant and Equipment – Net Goodwill and other assets, net Total Assets Liabilities and Stockholders’ Equity Liabilities and Stockholders’ Equity [Abstract] Current Liabilities: Current Liabilities: [Abstract] Trade accounts payable Accrued compensation and employee withholdings Other accrued expenses Current portion of long-term debt Total Current Liabilities Long-term debt, less current portion Deferred tax liabilities Stockholders’ Equity: Stockholders’ Equity: [Abstract] Common stock, par value $.10 a share; authorized 10,000,000 shares; issued and outstanding 2,903,889 and 2,913,412 shares, respectively Capital in excess of par value Deferred compensation Retained earnings Total Stockholders’ Equity Total Liabilities and Stockholders’ Equity Allowance for doubtful accounts receivable (in Dollars) Common stock par value (in Dollars per share) Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Condensed Consolidated Statements of Income (Unaudited) Condensed Consolidated Statements of Income (Unaudited) [Abstract] Net sales Cost of products sold Gross margin Selling and administrative expense Interest and other income Interest and other expense Earnings from operations before income taxes Income taxes Net income Basic earnings per share (in Dollars per share) Diluted earnings per share (in Dollars per share) Cash dividend per share (in Dollars per share) Weighted average number of common shares outstanding, basic (in Shares) Weighted average number of common shares outstanding, diluted (in Shares) Condensed Consolidated Statements Of Cash Flows (Unaudited) Condensed Consolidated Statements Of Cash Flows (Unaudited) [Abstract] Cash Flows From Operating Activities: Cash Flows From Operating Activities: [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments to reconcile net income to net cash provided by operating activities: [Abstract] Depreciation Deferred taxes Stock option compensation expense Changes in assets and liabilities: Changes in assets and liabilities: [Abstract] Decrease in accounts receivable Increase in inventories Decrease (increase) in prepaid expenses Decrease in accounts payable and accrued expenses Net cash provided by operations Cash Flows From Investing Activities: Cash Flows From Investing Activities: [Abstract] Purchase of property, plant and equipment Net cash used in investing activities Cash Flows From Financing Activities: Cash Flows From Financing Activities: [Abstract] Payments of long-term debt Dividends paid Net cash used in financing activities Net Decrease In Cash And Cash Equivalents Cash And Cash Equivalents At Beginning Of Year Cash And Cash Equivalents At End Of Reporting Period Supplemental cash flow information: Supplemental cash flow information: [Abstract] Cash paid during the period for: Cash paid during the period for: [Abstract] Interest Payroll withholding taxes in cashless stock option exercise Income taxes Non-cash investing and financing activities: Non-cash investing and financing activities: [Abstract] Acquisition of equipment through loans Note 1 - Condensed Consolidated Financial Statements Condensed Financial Statements [Text Block] Note 2 - Inventories Inventory Disclosure [Text Block] Note 3 - Other Assets Goodwill and Intangible Assets Disclosure [Text Block] Note 4 - Long-Term Debt Long-term Debt [Text Block] Note 5 - Property Property, Plant and Equipment Disclosure [Text Block] Note 6 - Earnings Per Share Earnings Per Share [Text Block] Schedule of Inventory, Current [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Inventories Inventories [Abstract] Raw material WIP Finished goods Basic And Diluted Earnings Per Share Basic And Diluted Earnings Per Share [Abstract] Numerator for earnings per share: Numerator for earnings per share: [Abstract] Net income (in Dollars) Denominator: Denominator: [Abstract] Denominator for basic earnings per share - weighted average shares Effect of dilutive securities: Effect of dilutive securities: [Abstract] Employee and non-employee options (in Dollars) Dilutive common shares Dilutive common shares [Abstract] Denominator for diluted earnings per share Diluted earnings per share (in Dollars per share) Goodwill Finite-Lived Intangible Assets, Accumulated Amortization Debt Instrument, Face Amount (in Dollars) Debt Instrument, Interest Rate, Stated Percentage Property, Plant and Equipment, Type [Domain] Area of Real Estate Property Estimated Cost of Expansion (in Dollars) Payments to Acquire Property, Plant, and Equipment (in Dollars) Scenario [Axis] Property, Plant and Equipment, Type [Axis] Scenario, Unspecified [Domain] Expansion [Member] Expansion [Member] Document and Entity Information [Abstract] PropertyPlantAndEquipmentDisclosureTextBlockAbstract LongTermDebtTextBlockAbstract InventoryDisclosureTextBlockAbstract GoodwillAndIntangibleAssetsDisclosureTextBlockAbstract CondensedFinancialStatementsTextBlockAbstract EstimatedCostOfExpansion EarningsPerShareTextBlockAbstract Liabilities, Current Payments of Ordinary Dividends, Common Stock Net Cash Provided by (Used in) Investing Activities Document Period End Date Net Cash Provided by (Used in) Operating Activities Cash and Cash Equivalents, Period Increase (Decrease) Assets, Current Amendment Flag Inventory Disclosure [Text Block] Payments to Acquire Property, Plant, and Equipment Increase (Decrease) in Accounts Receivable Finite-Lived Intangible Assets, Accumulated Amortization Entity Central Index Key Debt Instrument, Interest Rate, Stated Percentage Increase (Decrease) in Prepaid Expense and Other Assets Net Cash Provided by (Used in) Financing Activities Debt Instrument, Face Amount Entity Common Stock, Shares Outstanding Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities Document Fiscal Year Focus Entity Filer Category Entity Public Float Condensed Financial Statements [Text Block] Entity Voluntary Filers Liabilities and Equity Entity Current Reporting Status Assets Entity Registrant Name Earnings Per Share [Text Block] Long-term Debt [Text Block] Goodwill and Intangible Assets Disclosure [Text Block] Entity Well-known Seasoned Issuer Deferred Compensation Equity Stockholders' Equity Attributable to Parent Schedule of Inventory, Current [Table Text Block] Increase (Decrease) in Inventories Amendment Description Document Type Gross Profit Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Income Taxes Paid Current Fiscal Year End Date Area of Real Estate Property Document Fiscal Period Focus Property, Plant and Equipment Disclosure [Text Block] Statement [Table] Statement [Line Items]