Document And Entity Information Note To Financial Statement Details Textual statementsignificantaccountingpoliciespolicies statementnote2fairvalueoffinancialinstrumentstables statementnote3inventoriestables statementnote4propertyandequipmenttables statementnote5intangiblestables statementnote6otherassetstables statementnote7productwarrantiestables Amendment Flag Deferred income taxes statementnote8earningspershareofcommonstocktables statementnote9operationsandindustrysegmentstables Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] statementnote2fairvaluemeasurementofassetsdetails Class of Stock [Axis] statementnote3componentsofinventoriesdetails statementnote4propertyandequipmentdetails statementnote5intangibleassetsdetails statementnote6otherassetsdetails statementnote8basicanddilutedearningspersharedetails statementnote7changesinproductwarrantyliabilitydetails Notes To Financial Statements Document Fiscal Year Focus Document Fiscal Period Focus statementnote9informationonindustrysegmentsdetails Notes To Financial Statements [Abstract] Increase in reserve Stock compensation expense Document Period End Date Schedule of Segment Reporting Information, by Segment [Table Text Block] Current Fiscal Year End Date us-gaap_ProductWarrantyAccrualPayments Repairs and replacements us-gaap_AssetsCurrent Total current assets Entity Current Reporting Status Entity Voluntary Filers Income before income taxes Income before income taxes Entity Filer Category Provision for income taxes Document Type Changes in operating assets and liabilities: Cash value of life insurance policies - Note 2 Statement of Cash Flows [Abstract] us-gaap_CashSurrenderValueFairValueDisclosure Cash value of life insurance policies Entity Well-known Seasoned Issuer Proceeds from sale of equipment and patents Other assets - Note 6 Other assets Statement of Financial Position [Abstract] us-gaap_LiabilitiesCurrent Total current liabilities Adjustments to reconcile net income to net cash provided by operating activities: Fair Value, Inputs, Level 2 [Member] Fair Value Hierarchy [Domain] Fair Value, Hierarchy [Axis] Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Other income (expense) us-gaap_NumberOfReportableSegments Number of Reportable Segments Segment Reporting Disclosure [Text Block] us-gaap_LiabilitiesAndStockholdersEquity Liabilities and stockholders' equity Net sales: Accumulated other comprehensive loss Retained earnings Operating activities: Basic (in dollars per share) us-gaap_PaymentsOfDividends Dividends paid us-gaap_WeightedAverageNumberOfSharesOutstandingBasic Basic (in shares) General and administrative expenses us-gaap_GrossProfit Gross profit Statement [Line Items] Operating profit Operating income Non-operating income (expense): us-gaap_OtherExpenses Corporate expense us-gaap_OperatingExpenses Operating expenses Cash and cash equivalents Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Current assets: Consolidation Items [Domain] Consolidation Items [Axis] Operating Segments [Member] us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease Increase (Decrease) in cash and cash equivalents Effect of exchange rates on cash us-gaap_OtherNonoperatingIncomeExpense Other us-gaap_GainLossOnSaleOfPropertyPlantEquipment Gain on sale of equipment and patents us-gaap_NonoperatingIncomeExpense Net non-operating income (expense) Revenue Recognition, Policy [Policy Text Block] us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash used for financing activities Entity Registrant Name Raw materials Entity Central Index Key Depreciation and amortization us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchases of property and equipment Entity Common Stock, Shares Outstanding (in shares) Equity Components [Axis] Allowance for doubtful accounts Accounts receivable, net of allowances of $237,000 (March 28, 2015) and $302,000 (Sept. 27, 2014) Equity Component [Domain] Prepaid expenses us-gaap_LiabilitiesNoncurrent Total long-term liabilities us-gaap_InventoryValuationReserves Reserve for obsolescence us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding Adjusted weighted average shares and assumed conversions (in shares) Diluted (in shares) Inventories - Note 3 Inventories Work in process Finished goods Common stock, outstanding (in shares) New Accounting Pronouncements, Policy [Policy Text Block] Custom Products [Member] Represents Custom products business segment. Diluted (in dollars per share) Medical [Member] Medical member. Fair Value Disclosures [Text Block] Research and development expenses Consolidation, Policy [Policy Text Block] us-gaap_InterestExpense Interest expense us-gaap_ComprehensiveIncomeNetOfTax Comprehensive income Deferred compensation Automobiles Represents such type of PPE as automobiles. Land improvements Land Machinery and equipment Buildings Construction in process Furniture and fixtures us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses and other assets Provision for losses on accounts receivable us-gaap_PropertyPlantAndEquipmentGross Property and equipment, gross us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment Less accumulated depreciation Property, plant and equipment, net - Note 4 Property and equipment, net us-gaap_ProductWarrantyAccrual Accrued liability at beginning of period Accrued liability at end of period Goodwill Commitments and Contingencies Disclosure [Text Block] Selling and marketing expenses Dividends per common share (1) (in dollars per share) Increase in cash value of life insurance Corporate Segment [Member] Foreign currency translation loss us-gaap_IncreaseDecreaseInDeferredCompensation Deferred compensation Net sales us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash provided by operating activities Investing activities: Net income per share of common stock: Earnings Per Share [Text Block] us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_TableTextBlock Notes Tables Other comprehensive income (loss), after tax: Inventory Disclosure [Text Block] Common stock issued upon exercise of options Schedule of Inventory, Current [Table Text Block] Accounts payable and accrued expenses Operating profit (loss) before corporate expense: Common stock, authorized (in shares) Common stock, issued (in shares) us-gaap_DeferredTaxAssetsNetCurrent Deferred income taxes Common stock, par value (in dollars per share) Net income Net income Net income Numerator for basic and diluted earnings per share: us-gaap_IncreaseDecreaseInInventories Inventories Other Assets Disclosure [Text Block] Schedule of Other Assets, Noncurrent [Table Text Block] Common stock, no par value, 20,000,000 shares authorized; issued and outstanding shares 2,991,192 (March 28, 2015) and 2,962,007 (Sept. 27, 2014) Schedule of Product Warranty Liability [Table Text Block] Product Warranty Disclosure [Text Block] Schedule of Finite-Lived Intangible Assets [Table Text Block] us-gaap_PaymentsForProceedsFromOtherInvestingActivities Payments for other assets Foreign Currency Transactions and Translations Policy [Policy Text Block] Income Statement [Abstract] Accounts payable Accrued and sundry liabilities Denominator for diluted earnings per share: Weighted average shares (in shares) Intangible Assets Disclosure [Text Block] Denominator for basic earnings per share: Segments [Domain] Financing activities: Segments [Axis] Statement [Table] us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used for investing activities Scenario, Unspecified [Domain] Effect of dilutive securities: Scenario [Axis] Employee stock options (in shares) us-gaap_FiniteLivedIntangibleAssetsGross Intangible assets, gross us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization Less accumulated amortization us-gaap_IncreaseDecreaseInReceivables Accounts receivable Trade names Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Patents and trademarks us-gaap_StockholdersEquity Total shareholders' equity Non-competition agreements Significant Accounting Policies [Text Block] Property, Plant and Equipment [Table Text Block] Property, Plant and Equipment Disclosure [Text Block] Additional paid-in capital Customer relationships Accounting Policies [Abstract] Intangibles, net - Note 5 us-gaap_FiniteLivedIntangibleAssetsNet Net intangibles Other us-gaap_Liabilities Total liabilities us-gaap_SalesRevenueNet Net sales us-gaap_CostOfGoodsSold Cost of goods sold Commitments and contingencies - Note 10 Shareholders' equity: Current liabilities: us-gaap_Assets Assets us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements