Document And Entity Information
Other income (expense)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Note To Financial Statement Details Textual
Share-Based Payment Arrangement, Option, Exercise Price Range [Table Text Block]
Income taxes at federal statutory rates
Significant Accounting Policies
Share-Based Payment Arrangement, Option, Exercise Price Range [Table]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
us-gaap_InsuranceSettlementsReceivable
Unusual or Infrequent Item, or Both, Net of Insurance Proceeds
Note A - Summary of Significant Accounting Policies
Note C - Inventory
Note D - Property, Plant and Equipment
Note E - Goodwill and Intangible Assets
Note G - Income Taxes
Note I - Equity
Note J - Stock-based Compensation
Income Tax Disclosure [Text Block]
Note L - Cash Flow Information
Note M - Segment Reporting
Note N - Accumulated Other Comprehensive Income (Loss)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate
us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory
Note O - Leases
us-gaap_LiabilitiesCurrent
Total current liabilities
Note P - Related Parties
Note Q - Manufacturing Facility Closures and Disposals
Schedule ll - Valuation and Qualifying Accounts
Note A - Summary of Significant Accounting Policies - Contract Liability (Details)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term
Note A - Summary of Significant Accounting Policies - Unrecognized Tax Benefits (Details)
Nonvested, intrinsic value
Note A - Summary of Significant Accounting Policies - Calculation of EPS (Details)
Balance, weighted average remaining contractual life (Year)
Note A - Summary of Significant Accounting Policies - Share-based Compensation (Details)
Note C - Inventory - Summary of Inventories (Details)
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life
us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Note D - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details)
Note E - Goodwill and Intangible Assets - Intangible Assets by Reporting Segment (Details)
Note E - Goodwill and Intangible Assets - Goodwill by Reporting Segment (Details)
Note G - Income Taxes - Income Tax Expense (Details)
Note G - Income Taxes - Effective Income Tax Rate Reconciliation (Details)
Share-Based Payment Arrangement, Option, Activity [Table Text Block]
Note G - Income Taxes - Deferred Tax Assets and Liabilities (Details)
Note I - Equity - Schedule of Repurchase Agreements (Details)
Other general expense
Other general expense
Foreign currency translation adjustment
Foreign currency translation adjustments
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Granted, weighted average grant per share (in dollars per share)
Note J - Stock-based Compensation - Stock Option Activity (Details)
Proceeds from redemption and sales of marketable securities
Vested, weighted average grant per share (in dollars per share)
Note J - Stock-based Compensation - Stock Options by Exercise Price Range (Details)
Forfeited, weighted average grant per share (in dollars per share)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Balance, weighted average grant per share (in dollars per share)
Balance, weighted average grant per share (in dollars per share)
Note J - Stock-based Compensation - Restricted Stock Unit Activity (Details)
Forfeited, number (in shares)
Canceled (in shares)
Note J - Stock-based Compensation - Performance-based Unit Activity (Details)
Note L - Cash Flow Information - Supplemental Cash Flow Information (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
Balance, number (in shares)
Balance, number (in shares)
Note M - Segment Reporting - Operations Information by Reporting Segment (Details)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Granted, number (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
Vested, number (in shares)
Note N - Accumulated Other Comprehensive Income (Loss) - Changes to the Components of Accumulated Other Comprehensive Loss (Details)
Schedule of Nonvested Performance-Based Units Activity [Table Text Block]
Note O - Leases - Components of Lease Expense (Details)
Note O - Leases - Supplemental Balance Sheet Information Related to Leases (Details)
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]
Note O - Leases - Supplemental Cash Flow Information Related to Leases (Details)
Note O - Leases - Maturities of Lease Liabilities (Details)
Note P - Related Parties - Schedule of Related Party Transactions (Details)
Note Q - Manufacturing Facility Closures and Disposals - Restructuring and Related Costs (Details)
Schedule ll - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details)
Exercisable Options September 27, 2025 (in dollars per share)
Notes To Financial Statements
Notes To Financial Statements [Abstract]
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value
Exercisable Options September 27, 2025 (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Balance, weighted average exercise price (in dollars per share)
Balance (in dollars per share)
Canceled (in dollars per share)
Canceled, weighted-average exercise price (in dollars per share)
Goodwill and Intangible Assets Disclosure [Text Block]
Granted, weighted-average exercise price (in dollars per share)
Granted (in dollars per share)
Granted (in dollars per share)
Schedule of Goodwill [Table Text Block]
Goodwill [Table]
Exercised (in dollars per share)
Exercised, weighted-average exercise price (in dollars per share)
Accrued liabilities
Accrued compensation expense
Dividends payable
Accounts payable
Revolving Credit Facility [Member]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
Balance, option (in shares)
Balance (in shares)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod
Canceled (in shares)
Canceled, options (in shares)
Proceeds from disposal of property and equipment
Credit Facility [Axis]
Credit Facility [Domain]
Distribution
The amount of distribution expenses incurred during the period.
Tax effect in jurisdictions where rates differ from statutory rate
The amount of income tax expense or benefit for the period that may differ depending from state.
us-gaap_UnusualOrInfrequentItemLossGross
Unusual or Infrequent Item, or Both, Loss, Gross
us-gaap_UnusualOrInfrequentItemInsuranceProceeds
Unusual or Infrequent Item, or Both, Insurance Proceeds
us-gaap_PolicyTextBlockAbstract
Accounting Policies
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period
Trade Names [Member]
jjsf_PolicyTable
Franchise Rights [Member]
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate
Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Offering Date
Accrued insurance liability
Indefinite-Lived Intangible Assets [Axis]
Indefinite-Lived Intangible Assets, Major Class Name [Domain]
Lease Payments [Member]
Represents lease payments.
us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of property, plant and equipment
us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Options (in shares)
us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period (Year)
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized (in shares)
Pass Through Payments [Member]
Relating to pass through payments.
us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period (Year)
Noncompete Agreements [Member]
Current Liabilities
Developed Technology Rights [Member]
Assets
Total Assets
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]
Technology-Based Intangible Assets [Member]
Plan Name [Axis]
Plan Name [Domain]
Property, plant and equipment, at cost
us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Net earnings available to common stockholders
Customer Relationships [Member]
us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions
Share-Based Payment Arrangement, Exercise of Option, Tax Benefit
us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Net earnings available to common stockholders plus assumed conversions
Distribution Rights [Member]
The Credit Agreement [Member]
Represents the credit agreement.
us-gaap_AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits
Options
us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
Tax benefits
us-gaap_DebtInstrumentVariableInterestRateTypeExtensibleEnumeration
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]
Dippin’ Dots Holding, L.L.C. [Member]
Represents the acquisition of dippin' dots.
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]
The Amended Credit Agreement [Member]
Represents the amended credit agreement.
Finite-Lived Intangible Assets by Major Class [Axis]
Federal Funds Rate [Member]
Represents the federal funds rate variable rate.
Share-Based Payment Arrangement [Text Block]
Finite-Lived Intangible Assets, Major Class Name [Domain]
jjsf_LineOfCreditFacilityOptionsToIncreaseSizeOfCreditFacilityValue1
Line of Credit Facility, Options to Increase Size of Credit Facility, Value 1
Represents the first option for increase of credit facility.
jjsf_LineOfCreditFacilityOptionsToIncreaseSizeOfCreditFacilityValue2
Line of Credit Facility, Options to Increase Size of Credit Facility, Value 2
Represents the second option for increase of credit facility.
Award Type [Domain]
Effective Income Tax Rate Reconciliation [Table]
Net earnings
NET EARNINGS
Net Earnings
Award Type [Axis]
Finite-lived intangible assets, accumulated amortization
jjsf_GainOnInsuranceProceedsReceivedForDamageToPropertyPlantAndEquipment
Gain on insurance proceeds received for damage to property, plant, and equipment
Gain on Business Interruption Insurance Recovery
The amount of insurance proceeds received for damage to property, plant, and equipment.
Proceeds from insurance for fixed assets
Restricted Stock Units (RSUs) [Member]
Finite-lived intangible assets, gross
Restricted Stock [Member]
Performance Shares [Member]
Share-Based Payment Arrangement, Option [Member]
us-gaap_GoodwillAcquiredDuringPeriod
Goodwill, Acquired During Period
Indefinite-lived intangible assets, gross
Less accumulated depreciation and amortization
Business Combination [Text Block]
Commitments and Contingencies Disclosure [Text Block]
Property, Plant and Equipment, Net
Property, plant and equipment, net
Goodwill
Goodwill
Business Combination [Table]
Total Property, plant and equipment, at cost
Property, Plant and Equipment, Gross
Customer Group One [Member]
Represents information to the customer group designated as the "Customer Group One."
Largest Customer [Member]
Represents information pertaining to the largest customer.
jjsf_ApproximateNumberOfCustomers
Approximate Number of Customers
Represents the approximate number of customers.
jjsf_EmployeesCoveredUnderCollectiveBargainingAgreementPercentage
Employees Covered Under Collective Bargaining Agreement, Percentage
Represents the percentage of employees covered under a collective bargaining agreement.
Incentive Stock Options [Member]
Represents information pertaining to incentive stock options.
Non-qualified Stock Options [Member]
Represents information pertaining to non-qualified stock options.
Employee Stock Purchase Plan [Member]
Represents information pertaining to the employee stock purchase plan.
NFI [Member]
Represents information related to NFI.
Exercise Price Range 1 [Member]
The first range of option exercise prices.
Investing activities:
Exercise Price Range 2 [Member]
The second range of option exercise prices.
Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table]
us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet
Net changes in other operating assets and liabilities
Related Party Transaction [Table]
Related party transaction, amount
Related Party Transaction, Amounts of Transaction
Related Party Transactions Disclosure [Text Block]
Income taxes
Total expense
Schedule of Related Party Transactions [Table Text Block]
(Gain) Loss on marketable securities
jjsf_LineOfCreditFacilityIncreaseInMaximumBorrowingCapacity
Line Of Credit Facility Increase In Maximum Borrowing Capacity
represents the increase in maximum borrowing capacity.
jjsf_AssetsNoncurrentExcludingPropertyPlantAndEquipmentNet
Total other assets
Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer, excluding amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale.
General corporate expenses
Total operating expenses
us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Defined Contribution Plan, Employer Discretionary Contribution Amount
Administrative
Coupon redemption
jjsf_RevenueFromContractWithCustomerAdjustment
The amount of adjustment to revenue from contract with customer.
Cash and cash equivalents
Biscuits [Member]
Information pertaining to biscuits.
us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax
Stock options
us-gaap_AllocatedShareBasedCompensationExpense
Share-Based Payment Arrangement, Expense
us-gaap_CertificatesOfDepositAtCarryingValue
Certificates of Deposit, at Carrying Value
Amendment Flag
us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive Income
dei_CityAreaCode
City Area Code
Use of Estimates, Policy [Policy Text Block]
New Accounting Pronouncements, Policy [Policy Text Block]
Reclassification, Comparability Adjustment [Policy Text Block]
us-gaap_SharesOutstanding
Balance (in shares)
Balance (in shares)
Common Stock, Shares, Outstanding (in shares)
Current Fiscal Year End Date
us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Debt Instrument, Basis Spread on Variable Rate
us-gaap_LeaseCost
Total net lease cost
Capital Loss Carryforward [Member]
us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Operating Lease, Weighted Average Discount Rate, Percent
Document Fiscal Period Focus
Operating lease cost in Cost of goods sold and Operating Expenses
Document Fiscal Year Focus
Consolidation, Policy [Policy Text Block]
Short-term lease cost in Cost of goods sold and Operating Expenses
Lease, Cost [Table Text Block]
dei_DocumentPeriodEndDate
Document Period End Date
us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Operating Lease, Weighted Average Remaining Lease Term
dei_EntityFileNumber
Entity File Number
dei_EntityEmergingGrowthCompany
Entity Emerging Growth Company
dei_DocumentType
Document Type
dei_EntitySmallBusiness
Entity Small Business
dei_EntityShellCompany
Entity Shell Company
Document Information [Line Items]
us-gaap_GainOnBusinessInterruptionInsuranceRecovery
Gain on insurance proceeds received in excess of operating losses recognized
Gain on Business Interruption Insurance Recovery
Document Information [Table]
dei_EntityPublicFloat
Entity Public Float
Thinsters Cookie Business [Member]
The thinsters cookie business.
us-gaap_SeveranceCosts1
Severance Costs
dei_EntityFilerCategory
Entity Filer Category
Debt Instrument [Axis]
us-gaap_OtherRestructuringCosts
Other Restructuring Costs
dei_EntityCurrentReportingStatus
Entity Current Reporting Status
Debt Instrument, Name [Domain]
Charges
Restructuring Charges
dei_EntityVoluntaryFilers
Entity Voluntary Filers
us-gaap_DividendsCommonStock
Dividends declared
dei_EntityWellKnownSeasonedIssuer
Entity Well-known Seasoned Issuer
Award Timing Disclosures [Line Items]
dei_EntityNumberOfEmployees
Entity Number of Employees
Variable Rate [Domain]
us-gaap_AccountsReceivableNet
Accounts Receivable, after Allowance for Credit Loss
Intangible asset impairment charges
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)
us-gaap_GoodwillImpairmentLoss
Goodwill, Impairment Loss
Schedule of Long-Term Debt Instruments [Table]
Award Timing, How MNPI Considered [Text Block]
Share-based compensation
Share-based compensation
us-gaap_IncreaseDecreaseInAccountsReceivable
Decrease in accounts receivable
us-gaap_ConcentrationRiskPercentage1
Concentration Risk, Percentage
Statement of Comprehensive Income [Abstract]
dei_EntityTaxIdentificationNumber
Entity Tax Identification Number
Entity Central Index Key
Insider Trading Policies and Procedures [Line Items]
dei_EntityRegistrantName
Entity Registrant Name
Insider Trading Policies and Procedures Adopted [Flag]
Insider Trading Policies and Procedures Adopted [Flag]
Entity [Domain]
Customer Concentration Risk [Member]
Legal Entity [Axis]
dei_EntityAddressAddressLine1
Entity Address, Address Line One
ecd_NonRule10b51ArrTrmntdFlag
Non-Rule 10b5-1 Arrangement Terminated [Flag]
us-gaap_AmortizationOfIntangibleAssets
Amortization of Intangible Assets
dei_EntityAddressCityOrTown
Entity Address, City or Town
ecd_Rule10b51ArrTrmntdFlag
Rule 10b5-1 Arrangement Terminated [Flag]
ecd_Rule10b51ArrAdoptedFlag
Rule 10b5-1 Arrangement Adopted [Flag]
dei_EntityAddressPostalZipCode
Entity Address, Postal Zip Code
ecd_MnpiDiscTimedForCompValFlag
MNPI Disclosure Timed for Compensation Value [Flag]
dei_EntityAddressStateOrProvince
Entity Address, State or Province
ecd_NonRule10b51ArrAdoptedFlag
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Concentration Risk Type [Axis]
Material Terms of Trading Arrangement [Text Block]
us-gaap_AllowanceForDoubtfulAccountsReceivable
Accounts Receivable, Allowance for Credit Loss
Concentration Risk Type [Domain]
dei_EntityCommonStockSharesOutstanding
Entity Common Stock, Shares Outstanding (in shares)
Trading Arrangements, by Individual [Table]
Repurchase of common stock
Repurchase of common stock (in shares)
Repurchase of common stock (in shares)
us-gaap_AdvertisingExpense
Advertising Expense
Revenue Benchmark [Member]
us-gaap_IncreaseDecreaseInInventories
(Increase) Decrease in inventories
dei_TradingSymbol
Trading Symbol
Nature of Operation, Product Information, Concentration of Risk [Table]
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark [Domain]
jjsf_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsVolatilityCalculationTerm
Share Based Compensation Arrangement by Share Based Payment Award Fair Value Assumptions Volatility Calculation Term (Month)
The term calculated for volatility in fair value assumptions.
Five Year Options [Member]
The term of an option.
Ten Year Options [Member]
Term of an option.
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in shares)
dei_LocalPhoneNumber
Local Phone Number
Common Stock issued in connection with employee and director plans, net of tax withheld (in shares)
Exercised (in shares)
Exercised, options (in shares)
Stock Purchase Plan [Member]
Represents the stock purchase plan.
us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Line of Credit Facility, Remaining Borrowing Capacity
us-gaap_TableTextBlock
Notes Tables
Stock Issued to Outside Directors [Member]
Type of share-based compensation to outside directors.
Common stock issued for employee stock purchase plan, net of shares withheld for taxes
us-gaap_GainLossOnDispositionOfAssets1
Losses (Gains) from disposals of property & equipment
Common stock issued upon vesting of service share units, net of shares withheld for taxes (in shares)
us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Maximum Borrowing Capacity
Common Stock issued in connection with employee and director plans, net of tax withheld
Common stock issued upon vesting of service share units, net of shares withheld for taxes
Related and Nonrelated Parties [Axis]
Related and Nonrelated Parties [Domain]
Soft Pretzels [Member]
Type of food service sales to external customers.
Frozen Juices and Ices [Member]
Type of food service sales.
Churros [Member]
Type of food service sales.
Handhelds [Member]
Type of food service sales.
Bakery [Member]
Type of food service sales.
Food Service [Member]
Represents the Food Service segment.
Granted (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)
Marketing and selling
Equipment parts and other
Other Products [Member]
Type of food service sales.
Retail Supermarket [Member]
Represents the Retail Supermarket segment.
Raw materials
Packaging materials
us-gaap_LiabilitiesAndStockholdersEquity
Total Liabilities and Stockholders' Equity
us-gaap_CashUninsuredAmount
Cash, Uninsured Amount
Finished goods
UNITED STATES
Related Party Transaction [Axis]
Related Party Transaction [Domain]
Beverage [Member]
Type of food service sales.
Retained Earnings
us-gaap_ResearchAndDevelopmentExpense
Research and Development Expense
Accumulated other comprehensive loss
Repair and Maintenance Service [Member]
Type of sales.
Machine Sales [Member]
Type of sales.
Frozen Beverages [Member]
Represents the Frozen Beverages segment.
Debt Disclosure [Text Block]
us-gaap_InterestExpense
Interest expense
Changes in assets and liabilities, net of effects from purchase of companies
us-gaap_DisclosureTextBlockAbstract
Notes to Financial Statements
us-gaap_OtherNoncashIncomeExpense
Other
Noncurrent operating lease liabilities
Operating Lease, Liability, Noncurrent
Inventory Disclosure [Text Block]
Subsequent Event [Member]
Schedule of Inventory, Current [Table Text Block]
Inventory, Current [Table]
us-gaap_DeferredIncomeTaxesAndTaxCredits
Deferred income taxes
Total operating lease liabilities
Present value of lease obligations, operating leases
Subsequent Event [Table]
Current operating lease liabilities
Operating Lease, Liability, Current
Subsequent Event Type [Axis]
Other intangible assets, net
Defined Benefit Plan [Table]
Subsequent Event Type [Domain]
Current finance lease liabilities
Retirement Benefits [Text Block]
Noncurrent finance lease liabilities
Intangible assets
Subsequent Events [Text Block]
Operating lease right-of-use assets
Operating Lease, Right-of-Use Asset
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Total minimum payments, operating leases
Financing cash flows from finance leases
us-gaap_FinanceLeasePrincipalPayments
Payments on finance lease obligations
Total finance lease liabilities
Present value of lease obligations, finance leases
us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
Less amount representing interest, operating leases
us-gaap_DeferredIncomeTaxExpenseBenefit
Total deferred expense (benefit)
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
2028, operating leases
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
2029, operating leases
Depreciation, Depletion, and Amortization [Policy Text Block]
Finance lease right-of-use assets in Property, plant and equipment, net
Lessee, Operating Lease, Liability, to be Paid, Year Five
us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
Thereafter, operating leases
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
Finite-Lived Intangible Asset, Expected Amortization, Year Two
Fair Value of Financial Instruments, Policy [Policy Text Block]
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
Finite-Lived Intangible Asset, Expected Amortization, Year Three
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
Finite-Lived Intangible Asset, Expected Amortization, Year Four
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
2026, operating leases
us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Finite-Lived Intangible Asset, Expected Amortization, Year Five
us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
2027, operating leases
us-gaap_PaymentsForRestructuring
Payments for Restructuring
Payments
Plant closure expense
Restructuring Costs
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]
Foreign Currency Transactions and Translations Policy [Policy Text Block]
Other
Share-based compensation
us-gaap_ShareBasedCompensation
us-gaap_FiniteLivedIntangibleAssetUsefulLife
Finite-Lived Intangible Asset, Useful Life (Year)
Earnings Per Share, Policy [Policy Text Block]
Operating expenses
Income Tax, Policy [Policy Text Block]
Research, Development, and Computer Software, Policy [Policy Text Block]
Depreciation of fixed assets
Depreciation
Depreciation and amortization
us-gaap_AssetsCurrent
Total current assets
Share-Based Payment Arrangement [Policy Text Block]
Equity [Text Block]
jjsf_NumberOfMajorCustomers
Number of Major Customers
Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.
Advertising Cost [Policy Text Block]
Common stock, no par value; authorized, 50,000,000 shares; issued and outstanding 19,440,000 and 19,460,000 respectively
Adjustments to reconcile net earnings to net cash provided by operating activities
Amortization of intangibles and deferred costs
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets and deferred costs.
Common Stock, Shares Authorized (in shares)
Top Ten Customers [Member]
Represents information related to top ten customers.
us-gaap_TangibleAssetImpairmentCharges
Tangible Asset Impairment Charges
Common Stock, Shares, Issued (in shares)
jjsf_FinanceLeaseCostTotal
Total finance lease cost
Amount of finance lease cost.
Common stock, par value (in dollars per share)
Revenue from Contract with Customer [Policy Text Block]
Lessee, Leases [Text Block]
The entire disclosure for leases of the lessee.
Revision of Prior Period [Axis]
Supplemental noncash information on lease liabilities removed due to purchase of leased asset
Amount of decrease in lease obligation due to purchase of leased asset.
Supplemental noncash information on lease liabilities arising from obtaining right-of-use assets
Obtaining a right-of-use asset in exchange for a lease liability
Amount of increase in right-of-use asset obtained in exchange for lease liability.
Revision of Prior Period [Domain]
Lessee, Cash Flow Information [Table Text Block]
The tabular disclosure of cash flow information of leases of the lessee.
us-gaap_DeferredTaxAssetsValuationAllowance
Valuation allowance
Assets and Liabilities, Lessee [Table Text Block]
Tabular disclosure of lessee's assets and liabilities.
Statistical Measurement [Domain]
Lessee, Lease, Description [Table]
Operating cash flows from operating leases
Maximum [Member]
Summary of Valuation Allowance [Table Text Block]
Minimum [Member]
Lessee, Lease Liability, Maturity [Table Text Block]
Tabular disclosure of undiscounted cash flows of operating and finance lease liability.
Product and Service [Axis]
us-gaap_DeferredTaxAssetsNet
Total deferred tax assets, net
Product and Service [Domain]
Statistical Measurement [Axis]
Operating cash flows from finance leases
us-gaap_FinanceLeaseInterestPaymentOnLiability
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Preferred stock, $1 par value; authorized 10,000,000 shares; none issued
Preferred Stock, shares issued (in shares)
Interest
Cash Flow, Supplemental Disclosures [Text Block]
us-gaap_IncomeTaxesPaid
Income taxes
us-gaap_DeferredTaxAssetsOther
Net operating loss
Geographical [Axis]
Property, Plant and Equipment Disclosure [Text Block]
Geographical [Domain]
us-gaap_DeferredTaxAssetsGross
Total deferred tax assets
Schedule of Revenue by Major Customers, by Reporting Segments [Table]
Property, Plant and Equipment [Table Text Block]
Preferred Stock, Shares Authorized (in shares)
us-gaap_DeferredIncomeTaxLiabilities
Total deferred tax liabilities
Inventories
Total inventories
Schedule of Revenues from External Customers and Long-Lived Assets [Table]
Preferred stock, par value (in dollars per share)
Sales
Net sales
us-gaap_DeferredTaxAssetsInvestments
Unrealized gains/losses
us-gaap_DeferredTaxAssetsDeferredIncome
Deferred income
Fair Value Hierarchy and NAV [Domain]
Customer [Axis]
us-gaap_DeferredTaxAssetsInventory
Inventory capitalization
Customer [Domain]
Fair Value, Inputs, Level 2 [Member]
Fair Value Hierarchy and NAV [Axis]
Fire [Member]
Catastrophic Event [Domain]
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance
Accrued insurance liability
Balance Over 10 Million [Member]
Represents customers with an accounts receivable balance of over $10 million.
Construction in Progress [Member]
us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves
Allowances
Revision of Prior Period, Reclassification, Adjustment [Member]
Operating activities:
Catastrophic Event [Axis]
jjsf_ContractWithCustomerLiabilityRevenueRecognizedIncludingOpeningBalance
Amounts recognized as revenue
Amount of revenue recognized (including opening balance) that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Schedule of Segment Reporting Information, by Segment [Table]
Statement [Line Items]
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsCompensatedAbsences
Vacation accrual
Accounts Receivable, Allowance for Credit Loss, Current
Accounts receivable, net of allowances for estimated credit losses of $3,274 and $3,227, respectively
us-gaap_NumberOfReportableSegments
Number of Reportable Segments
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Share-based compensation
us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation
Bonus accrual
Equity, Capital Unit or Share [Table]
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Building [Member]
AOCI Attributable to Parent [Member]
us-gaap_StockholdersEquityAbstract
Equity, Attributable to Parent [Abstract]
Land [Member]
us-gaap_DeferredTaxAssetsCapitalLossCarryforwards
Capital loss carry forwards
Property, Plant and Equipment [Table]
Long-Lived Tangible Asset [Axis]
Long-Lived Tangible Asset [Domain]
Segment Reporting Disclosure [Text Block]
us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign
Foreign tax credit
Current assets
Investment income
Other assets
Trade name intangible assets, net
the value of trade names.
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations
Cash and cash equivalents at beginning of period
Cash and cash equivalents at end of period
Inventory, Policy [Policy Text Block]
Assets [Abstract]
Effect of exchange rates on cash and cash equivalents
us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
Net increase in cash and cash equivalents
us-gaap_NetCashProvidedByUsedInFinancingActivities
Net cash (used in) financing activities
Commitments and Contingencies
Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation [Abstract]
Segment operating income
Operating Income
Operating Income (Loss)
us-gaap_NetCashProvidedByUsedInOperatingActivities
Net cash provided by operating activities
Prepaid expenses and other
us-gaap_NetCashProvidedByUsedInInvestingActivities
Net cash (used in) investing activities
us-gaap_DeferredTaxLiabilities
Total deferred tax liabilities, net
jjsf_IntangibleAssetsAcquired
Intangible Assets Acquired
Amount of intangible assets acquired during the period, including both indefinite-lived intangible assets and finite-lived intangible assets.
us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
Amortization of goodwill and other intangible assets
Segment gross profit
Gross profit
Cost of goods sold
Deferred income taxes
Derivatives, Policy [Policy Text Block]
Consolidation Items [Domain]
us-gaap_InventoryWriteDown
Inventory Write-down
us-gaap_ContractWithCustomerLiability
Beginning Balance
Ending Balance
us-gaap_DeferredTaxLiabilitiesLeasingArrangements
Right-of-use assets
us-gaap_SelfInsuranceReserve
Self Insurance Reserve
Consolidation Items [Axis]
us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued
Marketable Securities, Policy [Policy Text Block]
Concentration Risk, Credit Risk, Policy [Policy Text Block]
us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Depreciation of property, plant and equipment
us-gaap_LettersOfCreditOutstandingAmount
Letters of Credit Outstanding, Amount
us-gaap_PaymentsOfDividends
Payment of cash dividend
us-gaap_PaymentsForRepurchaseOfCommonStock
Payments to repurchase common stock
jjsf_DeferredTaxLiabilitiesAccountingMethodChange481A
Accounting method change 481(a)
Amount of deferred tax liability attributable to taxable temporary differences from accounting method change 481 (a).
us-gaap_AccruedInsuranceCurrentAndNoncurrent
Accrued Insurance
Retained Earnings [Member]
us-gaap_ProceedsFromStockOptionsExercised
Proceeds from Stock Options Exercised
Proceeds from issuance of stock
us-gaap_CurrentStateAndLocalTaxExpenseBenefit
State
us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
State
us-gaap_AccountsPayableTradeCurrentAndNoncurrent
Accounts Payable, Trade
us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Share Repurchase Program, Remaining Authorized, Amount
Common Stock Including Additional Paid in Capital [Member]
us-gaap_CurrentForeignTaxExpenseBenefit
Foreign
us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Foreign
us-gaap_StockRepurchaseProgramPeriodInForce1
Share Repurchase Program, Period in Force
us-gaap_CurrentFederalTaxExpenseBenefit
U.S. Federal
us-gaap_DeferredFederalIncomeTaxExpenseBenefit
U.S. Federal
jjsf_OperatingLossCarryforwardsSubjectToLimitationAndExpiration
Operating Loss Carryforwards, Subject to Limitation and Expiration
Amount of operating loss carryforwards that are subject to limitation and expiration under Code Section 382.
Class of Treasury Stock [Table Text Block]
Equity Components [Axis]
Equity Component [Domain]
us-gaap_CurrentIncomeTaxExpenseBenefit
Total current expense
Stock, Class of Stock [Table]
Transportation Management [Member]
Represents transportation management.
jjsf_DistributionCenters
Distribution Centers
Number of distributions centers.
us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Earnings before income taxes
Share Repurchase Program 2025 [Member]
Represents the 2025 share repurchase program.
dei_IcfrAuditorAttestationFlag
ICFR Auditor Attestation Flag
Comprehensive Income (Loss) Note [Text Block]
us-gaap_LineOfCredit
Long-Term Line of Credit
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Average price per share (in dollars per share)
Stock Repurchased and Retired During Period, Price Per Share
Price per share of stock repurchased and retired during the period.
License and Rights [Member]
Type of intangible asset.
jjsf_ContractWithCustomerAssetAllowanceForDeductions
Contract with Customer, Asset, Allowance for Deductions
Represents the amount of allowance for deductions for right to consideration in exchange for good or service transferred to customer.
Income Tax Authority, Name [Axis]
Income Tax Authority, Name [Domain]
Internal Revenue Service (IRS) [Member]
Income Tax Jurisdiction [Axis]
Income Tax Jurisdiction [Domain]
Domestic Tax Jurisdiction [Member]
Office Equipment [Member]
Equipment [Member]
Transportation Equipment [Member]
dei_DocumentAnnualReport
Document Annual Report
Machinery and Equipment [Member]
Cash and Cash Equivalents, Policy [Policy Text Block]
dei_EntityIncorporationStateCountryCode
Entity Incorporation, State or Country Code
us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits
Balance
Balance
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]
dei_DocumentTransitionReport
Document Transition Report
dei_DocumentFinStmtErrorCorrectionFlag
Document Financial Statement Error Correction [Flag]
dei_EntityInteractiveDataCurrent
Entity Interactive Data Current
us-gaap_CommonStockDividendsPerShareDeclared
Common Stock, Dividends, Per Share, Declared (in dollars per share)
Related Party [Member]
us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
Settlements
dei_SecurityExchangeName
Security Exchange Name
us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Reductions for tax positions of prior years
us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Additions based on tax positions related to the current year
dei_Security12bTitle
Title of 12(b) Security
us-gaap_ValuationAllowancesAndReservesBalance
Opening balance
Allowance for estimated credit losses
jjsf_EffectOfDilutiveSecuritiesOptionsPerShare
Options (in dollars per share)
Effect of dilutive securities options per share
Coupon Redemtion [Member]
Coupon redemtion [member]
Charged to expense
Deductions
Capital expenditures
dei_AuditorName
Auditor Name
Labor Management Services [Member]
Represents labor management services.
dei_AuditorFirmId
Auditor Firm ID
dei_AuditorLocation
Auditor Location
Segments [Axis]
Segments [Domain]
us-gaap_TaxCreditCarryforwardAmount
Tax Credit Carryforward, Amount
jjsf_DeferredTaxAssetsOperatingLeaseLiabilities
Operating lease liabilities
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from operating lease liability.
us-gaap_SharePrice
Share Price (in dollars per share)
us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)
Weighted average number of diluted shares (in shares)
Net earnings available to common stockholders plus assumed conversions (in shares)
us-gaap_RepaymentsOfLinesOfCredit
Repayment of borrowings under credit facility
Tax Credit Carryforward [Axis]
Non-US [Member]
Tax Credit Carryforward, Name [Domain]
us-gaap_OperatingLossCarryforwards
Operating Loss Carryforwards
Borrowings under credit facility
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Statement [Table]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table]
Statement of Financial Position [Abstract]
Earnings per diluted share (in dollars per share)
Net earnings available to common stockholders plus assumed conversions (in dollars per share)
Weighted average number of basic shares (in shares)
Net earnings available to common stockholders (in shares)
us-gaap_RestructuringIncurredCostStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration]
us-gaap_EffectiveIncomeTaxRateContinuingOperations
Effective Income Tax Rate Reconciliation, Percent
Earnings per basic share (in dollars per share)
Net earnings available to common stockholders (in dollars per share)
Business Combination [Axis]
Business Combination [Domain]
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Statement of Cash Flows [Abstract]
us-gaap_LesseeFinanceLeaseRemainingLeaseTerm
Lessee, Finance Lease, Remaining Lease Term
Statement of Stockholders' Equity [Abstract]
Income Statement [Abstract]
us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
Total other comprehensive income (loss), net of tax
us-gaap_RestructuringReserve
Balance
Balance
us-gaap_LesseeOperatingLeaseRemainingLeaseTerm
Lessee, Operating Lease, Remaining Lease Term
Non-cash plant shutdown expenses
us-gaap_RestructuringReserveSettledWithoutCash2
Interest on lease liabilities in Interest expense & other
us-gaap_FinanceLeaseLiabilityPaymentsDue
Total minimum payments, finance leases
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Amortization of assets in Cost of goods sold and Operating Expenses
Finance Lease, Liability, to be Paid, Year Five
us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive
Thereafter, finance leases
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount
Less amount representing interest, finance leases
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths
2026, finance leases
Manufacturing Facility Closing in Atlanta GA [Member]
Represents Manufacturing Facility Closing in Atlanta GA .
us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo
2027, finance leases
Manufacturing Facility Closing in Colton CA [Member]
Represents Manufacturing Facility Closing in Colton CA.
us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree
2028, finance leases
us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour
2029, finance leases
Manufacturing Plant Closing in Colton California [Member]
Represents Manufacturing Plant Closing in Colton California.
Restructuring Plan [Axis]
Restructuring Plan [Domain]
Manufacturing Facility Closing in Holly Ridge, NC [Member]
Represents Manufacturing Facility Closing in Holly Ridge, NC.
jjsf_OperatingLeaseAndFinanceLeaseImpairmentLoss
Operating Lease and Finance Lease, Impairment Loss
Amount of impairment loss from right-of-use asset from operating lease and finance lease.
srt_StockRepurchaseProgramAuthorizedAmount1
Share Repurchase Program, Authorized, Amount
Other Restructuring [Member]
Type of Restructuring [Domain]
Facility Closing [Member]
us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent
Finance Lease, Weighted Average Discount Rate, Percent
Share Repurchase Program [Domain]
Share Repurchase Program [Axis]
Employee Severance [Member]
Board Advisory Consulting Fees [Member]
Related to board advisory consulting fees.
Restructuring and Related Activities Disclosure [Text Block]
Other Commitments [Table]
Attitudinal and Research Services [Member]
Related to attitudinal and research services.
Restructuring and Related Costs [Table Text Block]
Restructuring Cost [Table]
Restructuring Type [Axis]
us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1
Finance Lease, Weighted Average Remaining Lease Term
Other, net
Financing activities:
AMC Global [Member]
Related to AMC Global.
Other long-term liabilities
us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
PHILLY SWIRL [Member]
The PHILLY SWIRL acquisition.
us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Unrecorded Unconditional Purchase Obligation
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
us-gaap_StockholdersEquity
Total stockholders' equity
Balance
Balance
us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Payments for purchases of companies, net of cash acquired
Class of Stock [Axis]
jjsf_ContractWithCustomerLiabilityAdditions
Additions to contract liability
The amount of additions to contract with customer liability.
Long-term debt
Options exercisable, contractual life (Year)
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
us-gaap_PaymentsToAcquireBusinessesGross
Payments to Acquire Businesses, Gross
Options outstanding, weighted average exercise price (in dollars per share)
Options outstanding, contractual life (Year)
Options exercisable (in shares)
Options exercisable, weighted average exercise price (in dollars per share)
Operating Segments [Member]
Upper limit (in dollars per share)
Options outstanding (in shares)
State income taxes, net of federal income tax benefit
Exercise Price Range [Axis]
Exercise Price Range [Domain]
Lower limit (in dollars per share)