Cover [Abstract] Entity Registrant Name Entity Central Index Key Document Type Amendment Flag Current Fiscal Year End Date Entity Small Business Entity Shell Company Entity Emerging Growth Company Entity Current Reporting Status Document Period End Date Entity Filer Category Document Fiscal Period Focus Document Fiscal Year Focus Entity Common Stock Shares Outstanding Document Quarterly Report Document Transition Report Entity File Number Entity Incorporation State Country Code Entity Tax Identification Number Entity Address Address Line 1 Entity Address Address Line 2 Entity Address City Or Town Entity Address State Or Province Entity Address Postal Zip Code City Area Code Local Phone Number Security 12b Title Trading Symbol Security Exchange Name Entity Interactive Data Current CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) Net sales Cost of products sold [Cost of Product and Service Sold] Gross margin [Gross Profit] Product development expense [Research and Development Expense] Selling and administrative expenses [Selling, General and Administrative Expense] Operating profit [Operating Income (Loss)] Interest expense [Interest Expense, Operating and Nonoperating] Other income (expense) Income before income taxes from continuing operations [Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest] Income tax expense [Income Tax Expense (Benefit)] Net income from continuing operations [Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest] Discontinued Operations (see note B) Income from operations of discontinued unit Income tax expense [Discontinued Operation, Tax (Expense) Benefit from Provision for (Gain) Loss on Disposal] Income from discontinued operations [Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest] Net Income [Net Income (Loss) Attributable to Parent] Earnings per share from continuing operations: Basic Diluted Earnings per share from discontinued operations: Basic [Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share] Diluted [Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share] Total earnings per share: Basic [Earnings Per Share, Basic] Diluted [Earnings Per Share, Diluted] Cash dividends per share: CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) Net income Other comprehensive income: Change in foreign currency translation Change in fair value of foreign currency swap Change in pension and other postretirement benefit costs, net of taxes of: $177,258 in 2025 and $982,414 in 2024 Total other comprehensive income [Other Comprehensive Income (Loss), Net of Tax] Comprehensive income [Comprehensive Income (Loss), Net of Tax, Attributable to Parent] CONDENSED CONSOLIDATED BALANCE SHEETS ASSETS Current Assets Cash and cash equivalents Accounts receivable, less allowances: 2026 - $654,901; 2025 - $633,391 Inventories [Inventory, Net] Current portion of notes receivable Prepaid expenses and other current assets Total Current Assets [Assets, Current] Property, Plant and Equipment Accumulated depreciation [Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment] Property, Plant and Equipment, Net [Property, Plant and Equipment, Net] Goodwill [Goodwill] Trademarks Patents and other intangibles, net of accumulated amortization Deferred income taxes Right of use assets Other Long-term assets Total Other Assets [Other Assets] TOTAL ASSETS [Assets] LIABILITIES AND SHAREHOLDERS' EQUITY Current Liabilities Accounts payable Accrued compensation Other accrued expenses Current portion of operating lease liability Current portion of finance lease liability Total Current Liabilities [Liabilities, Current] Other long-term liabilities Operating lease liability, less current portion Finance lease liability, less current portion Long-term debt, less current portion Accrued postretirement benefits Accrued pension cost Total Liabilities [Liabilities] Shareholders' Equity Voting Preferred Stock, no par value: Authorized and unissued: 1,000,000 shares Nonvoting Preferred Stock, no par value: Authorized and unissued: 1,000,000 shares Common Stock, no par value, Authorized: 50,000,000 shares Issued: 9,189,555 shares as of April 4, 2026 and 9,179,288 shares as of January 3, 2026 Outstanding: 6,030,914 shares as of April 4, 2026 and 6,041,767 shares as of January 3, 2026 Treasury Stock: 3,158,641 shares as of April 4, 2026 and 3,137,521 shares as of January 3, 2026 [Treasury Stock, Value] Retained earnings Accumulated other comprehensive loss: Foreign currency translation Unrealized gain on foreign currency swap, net of tax Unrecognized net pension and postretirement benefit costs, net of tax Accumulated other comprehensive loss [Accumulated Other Comprehensive Income (Loss), Net of Tax] Total Shareholders' Equity [Equity, Attributable to Parent] TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY [Liabilities and Equity] Accounts receivable, allowance for doubtful accounts Shareholders' Equity Voting preferred stock, par value Voting preferred stock, shares authorized Nonvoting preferred stock, par value Nonvoting preferred stock, shares authorized Common stock, par value Common stock, shares authorized Common stock, shares issued Common stock, shares outstanding Treasury stock shares CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) Operating Activities Net income [Net Income (Loss), Including Portion Attributable to Noncontrolling Interest] Less: Income from discontinued operations Income from continuing operations [Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Depreciation and amortization Acquisition related expenses Reduction in carrying amount of ROU assets Unrecognized pension and postretirement benefit Loss on sale of equipment and other assets [Gain (Loss) on Disposition of Property Plant Equipment] Provision for doubtful accounts Stock compensation benefit Changes in operating assets and liabilities: Accounts receivable [Increase (Decrease) in Accounts Receivable] Inventories [Increase (Decrease) in Inventories] Prepaid expenses and other [Increase (Decrease) in Prepaid Expense and Other Assets] Other assets [Increase (Decrease) in Other Operating Assets] Accounts payable [Increase (Decrease) in Accounts Payable] Accrued compensation [Increase (Decrease) in Employee Related Liabilities] Change in operating lease liability Other accrued expenses [Increase (Decrease) in Other Accrued Liabilities] Net cash provided by (used in) operating activities [Cash Provided by (Used in) Operating Activity, Including Discontinued Operation] Investing Activities Marketable securities [Payments to Acquire Marketable Securities] Acquisition [Payments to Acquire Businesses, Gross] Payments received from notes receivable Proceeds from sale of equipment Purchases of property, plant, and equipment [Payments to Acquire Property, Plant, and Equipment] Net cash used in investing activities [Cash Provided by (Used in) Investing Activity, Including Discontinued Operation] Financing Activities Payments on short term borrowings (revolver) Principal payments on long-term debt [Repayments of Long-Term Debt] Financing leases, net Purchase common stock for treasury [Payments for Repurchase of Common Stock] Dividends paid [Payments of Dividends] Net cash used in financing activities [Cash Provided by (Used in) Financing Activity, Including Discontinued Operation] Discontinued Operations [Discontinued Operations] Cash provided by operating activities Cash used in financing activities Cash provided by discontinued operations [Cash provided by discontinued operations] Effect of exchange rate changes on cash Net change in cash and cash equivalents [Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation] Cash and cash equivalents at beginning of period [Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation] Cash and cash equivalents at end of period Supplemental disclosure of cash flow information: Interest Income taxes Non-cash investing and financing activities Right of use asset Lease liability CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY (UNAUDITED) Statement [Table] Statement [Line Items] Equity Components [Axis] Common Stock Retained Earnings Accumulated other comprehensive Income (Loss) Treasury Stock Balance, shares [Shares, Issued] Balance, amount Net Income Cash dividends declared, $0.44 per share Currency translation adjustment Change in fair value of foreign currency swap [Change in fair value of foreign currency swap] Change in pension and other postretirement benefit costs, net of tax Treasury Stock Purchase, shares Treasury Stock Purchase, amount Issuance of stock awards, net, shares Issuance of stock awards, net, amount Issuance of Common Stock for directors' fees, shares Issuance of Common Stock for directors' fees, amount Balance, shares Balance, amount Insider Trading Arragements Insider Trading Arrangement [LineItems] Rule 10b5-1 Arrangement Adopted [Flag] Rule 10b5-1 Arrangement Tretment [Flag] Non Rule 10b5-1 Arrangement Adopted [Flag] Non Rule 10b5-1 Arrangement Tretment [Flag] Basis of Presentation Basis of Presentation Business Description and Basis of Presentation [Text Block] Discontinued Operations Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Earnings Per Share Earnings Per Share Earnings Per Share [Text Block] Fair Value of Instruments Fair Value of Instruments Financial Instruments Disclosure [Text Block] Inventories Inventories Inventory Disclosure [Text Block] Goodwill Goodwill Goodwill Disclosure [Text Block] Leases Leases Lessee, Operating Leases [Text Block] Debt Debt Debt Disclosure [Text Block] Stock Options and Awards Stock Options and Awards Share-Based Payment Arrangement [Text Block] Share Repurchase Program Share Repurchase Program [Share Repurchase Program] Revenue Recognition Revenue Recognition [Revenue Recognition] Income Taxes Income Taxes Income Tax Disclosure [Text Block] Retirement Benefit Plans Retirement Benefit Plans Retirement Benefits [Text Block] Recent Accounting Pronouncements Recent Accounting Pronouncements [Recent Accounting Pronouncements] Concentration of Risk Concentration of Risk Concentration Risk Disclosure [Text Block] Segment Information Segment Information Segment Reporting Disclosure [Text Block] Schedule of Income from Discontinued Operations Schedule of Denominators Used in Earnings Per Share Computations Schedule of Fair Value of Derivative Instruments Schedule of Fair Value of Derivative Condensed Consolidated Balance Sheets Schedule of Inventories Schedule of Future Minimum Payments Under Non-Cancelable Operating Leases Schedule of Stock Appreciation Rights Activity Schedule of SARs Outstanding and Exercisable Schedule of Outstanding Stock Grants Schedule of Share Repurchase Program Schedule of Significant Disclosures Relating to Benefit Plans Schedule of Company Made Contributions Towards Benefit Plans Schedule of Segment Operating Profit Disposal Group Classification Axis Discontinued Operations [Member] Net sales [Disposal Group, Including Discontinued Operation, Revenue] Costs of products sold [Disposal Group, Including Discontinued Operation, Costs of Goods Sold] Gross margin [Disposal Group, Including Discontinued Operation, Gross Profit (Loss)] Selling and administrative expenses [Disposal Group, Including Discontinued Operation, General and Administrative Expense] Operating Income Interest expense [Disposal Group, Including Discontinued Operation, Interest Expense] Income from discontinued operations before income taxes Income tax expense [Discontinued Operation, Tax Effect of Discontinued Operation] Income from discontinued operations, net of tax Basic [Abstract] Weighted average shares outstanding Diluted [Abstract] Weighted average shares outstanding [Weighted Average Number of Shares Outstanding, Diluted, Adjustment] Dilutive stock appreciation rights Denominator for diluted earnings per share Hedging Relationship [Axis] Loss Reclassified from OCI to Earnings [Member] Designated foreign currency hedge contracts, net of tax Asset Class [Axis] Derivative Assets [Member] Designated foreign currency hedge contracts Assets, other current assets Designated foreign currency hedge contracts Assets, other long-term assets Raw material and component parts Work in Process Finished Goods Total Inventories Aggregate carrying amount of goodwill Operating Lease 2026 2027 2028 2029 2030 Thereafter Operating Leases, Future Minimum Payments Due gross Less effects of discounting OperatingLeases [Lessee, Operating Lease, Liability, Undiscounted Excess Amount] Lease liabilities recognized Operating Leases Finance Lease 2026 Finance 2027 finance 2028 finance 2029 finance 2030 finance Thereafter [Thereafter] Finance Leases, Future Minimum Payments Due gross Less effects of discounting Finance Leases [Finance Lease, Liability, Undiscounted Excess Amount] Lease liabilities recognized financing Leases Operating lease liabilities Finance lease liabilities Weighted average lease term for operating leases Weighted average lease term for finance leases Weighted average discount rate operating leases Weighted average discount rate finance leases Trading Activity [Axis] Plan Name [Axis] Credit Agreement [Member] Bottom [Member] Top [Member] Letters of credit Swing line loans Increase in revolving commitment amount Line of credit under credit agreement Revolving credit facility Ratio description Margin rate Derivative Instrument Risk Axis Stcok Options [Member] Number of units outstanding at beginning of period [Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number] Number of units, Issued Number of units, Expired [Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period] Number of units, Exercised [Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period] Number of units, Forfeited [Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period] Number of units outstanding at end of period Weighted average exercise price, beginning balance [Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price] Weighted average exercise price, Issued Weighted average exercise price, Expired Weighted average exercise price, exercised Weighted average exercise price, forfeited Weighted average exercise price, ending balance Related Party Transaction Axis Minimum [Member] SAR [Member] Maximum [Member] Outstanding Exercisable Weighted- Average Remaining Contractual Life Weighted avaerage exercise price Range of Exercise Prices (in dollar per share) Stock Options [Member] Number of units, Issued [Stock Issued During Period, Shares, Other] Number of units, Exercised [Number of units, Exercised] 2020 Plan [Member] Expected term Volatility deviation Risk-free rate Stock compensation expense [Share-Based Payment Arrangement, Expense] Number of units, Issued [Stock Issued During Period, Shares, New Issues] Common Stock Shares Reserved For Future Issuance Intrinsic value Stock Option Granted Income Statement Location Axis Share Repurchase Program Axis Total Number of Shares Purchased As Part of Publicly Announced Plans or Programs [Member] Maximum Number of Shares That May Yet be Purchased Under the Plans or Programs [Member] Average Price Paid Per Share [Member] Total Number of Shares Purchased [Member] Total Number Of Shares Purchased As Part Of Publicly Announced Plansor Programs Maximum Number Of Shares That May Yet Be Purchased Under The Plans Or Programs Average Price Paid Per Share During The Period Total Number Of Shares Purchased Expire term Maximum Number Of Shares That May Yet Be Purchased Under The Plans Or Program Retirement Plan Type Axis Pension Benefit [Member] Other Postretirement Benefit [Member] Service cost Interest cost Expected return on plan assets [Defined Benefit Plan, Expected Return (Loss) on Plan Assets] Amortization of prior service cost Amortization of the net loss Net periodic benefit cost Retirement Plan Name Axis Regular Matching Contributions [Member] Transitional Credit Contributions [Member] Non-Discretionary Contributions [Member] Total contributions for the period 2026 [Defined Benefit Plan, Expected Future Benefit Payment, Year One] Cash contributions Short-Term Debt, Type [Axis] Concentration Risk By Benchmark Axis Concentration Risk By Type Axis Line Of Credit Member [Member] Accounts Receivable [Member] Customer Concentration Risk [Member] Threshold percentage of concentration risk FDI insurance amount Basis spread on variable rate Net Sales Material cost [Cost, Direct Material] Labor cost [Cost, Direct Labor] Other variable and fixed overhead Gross Margin Operating Profit Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. Issuance value per share of no-par value, voting preferred stock; generally not indicative of the fair market value per share. The maximum number of voting preferred shares permitted to be issued by an entity's charter and bylaws and unissued as of the end of the reporting period. Issuance value per share of no-par value, nonvoting preferred stock; generally not indicative of the fair market value per share. The maximum number of nonvoting preferred shares permitted to be issued by an entity's charter and bylaws and unissued as of the end of the reporting period.