Cover [Abstract] Document Type Document Annual Report Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Current Fiscal Year End Date Current Fiscal Year End Date Document Transition Report Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Address, Address Line One Entity Address, City Or Town Entity Address, State Or Province Entity Tax Identification Number Entity Address, Postal Zip Code City Area Code Local Phone Number Title of 12(b) Security Trading Symbol Security Exchange Name Entity Well Known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company ICFR Auditor Attestation Flag Document Financial Statement Error Correction [Flag] Entity Shell Company Entity Public Float Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Documents Incorporated By Reference Text Block Document Fiscal Period Focus Document Fiscal Period Focus Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Auditor Name Auditor Location Auditor Firm ID CONSOLIDATED BALANCE SHEETS [Abstract] Current assets: Cash and cash equivalents Short-Term Investments Short term investments Accounts receivable, less allowance for doubtful accounts of $6,027 and $2,027, respectively Accounts receivable, net Accounts receivable, less allowance for credit losses of $2,043 and $1,922, respectively Inventories, net Inventories Inventories, net Prepaid expenses and other current assets Interest Receivable, Current Interest receivable Income taxes receivable us-gaap_AssetsCurrent Total current assets Equipment and leasehold improvements, net Equipment and leasehold improvements, net Other assets: Long-Term Investments Long term investments Operating lease right-of-use asset Cash surrender value of life insurance us-gaap_OtherAssetsNoncurrent Total other assets us-gaap_Assets Total segment assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Accounts payable Accrued Liabilities, Current Accrued liabilities Total accrued liabilities Contract With Customer Liability Current Deferred revenue us-gaap_OperatingLeaseLiabilityCurrent Operating lease liability Taxes Payable, Current Income taxes payable us-gaap_LiabilitiesCurrent Total current liabilities Long-term liabilities: Deferred compensation Deferred revenue Operating lease liability us-gaap_LiabilitiesNoncurrent Total long-term liabilities us-gaap_Liabilities Total liabilities Stockholders' equity: Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 9,179,795 and 9,137,795, respectively Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 9,456,438 and 9,299,795, respectively Paid in capital Retained earnings us-gaap_StockholdersEquity Balance Balance Total stockholders' equity us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and stockholders' equity Accounts receivable, allowance for credit losses Allowance for credit losses Common stock, par value (in dollars per share) Common stock, shares authorized (in shares) Common stock, shares issued (in shares) Common stock, shares outstanding (in shares) Balance (in shares) Balance (in shares) CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract] Net sales Net Sales Cost of goods sold us-gaap_GrossProfit Gross profit Selling, general and administrative expenses Selling, general and administrative expenses us-gaap_OperatingIncomeLoss Loss from operations Interest income us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments Loss before income tax provision (benefit) Income Tax Expense (Benefit) Income tax provision (benefit) Total income tax provision (benefit) Income tax provision (benefit) Net income (loss) Net loss Net loss Net (loss) income Earnings Per Share Basic And Diluted 1 [Abstract] Earnings Per Share Basic And Diluted 1 [Abstract] Loss per common share: us-gaap_EarningsPerShareBasic Basic (in dollars per share) Basic (in dollars per share) us-gaap_EarningsPerShareDiluted Diluted (in dollars per share) Diluted (in dollars per share) Weighted-average number of shares: Basic (in shares) Weighted average shares, basic (in shares) Diluted (in shares) Diluted shares (in shares) CONSOLIDATED STATEMENTS OF CASH FLOWS [Abstract] Operating activities: Adjustments to reconcile net loss to net cash used in operating activities: (Recovery of) provision for doubtful accounts of accounts receivable Provision for (recovery of) credit losses Depreciation of equipment and leasehold improvements Depreciation expense Amortization of discount on treasury securities Amortization of discount on treasury securities Net accretion of discount on treasury securities Operating Lease, Right-of-Use Asset, Amortization Expense Noncash operating lease expense us-gaap_ShareBasedCompensation Stock-based compensation expense us-gaap_LifeInsuranceCorporateOrBankOwnedChangeInValue Change in cash surrender value of life insurance Provision (benefit) for deferred compensation Provision for deferred compensation Net changes in operating assets and liabilities: us-gaap_IncreaseDecreaseInAccountsReceivable Accounts receivable us-gaap_IncreaseDecreaseInInventories Inventories us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets Prepaid expenses and other current assets Increase (Decrease) in Interest and Dividends Receivable Interest receivable us-gaap_IncreaseDecreaseInIncomeTaxesReceivable Income taxes receivable Increase (Decrease) in Income Taxes Payable Income taxes payable us-gaap_IncreaseDecreaseInAccountsPayable Accounts payable us-gaap_IncreaseDecreaseInAccruedLiabilities Accrued liabilities us-gaap_IncreaseDecreaseInContractWithCustomerLiability Deferred revenue us-gaap_NetCashProvidedByUsedInOperatingActivities Net cash used in operating activities Investing activities: us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchase of equipment and leasehold improvements us-gaap_PaymentsToAcquireLifeInsurancePolicies Life insurance premiums paid Proceeds from Maturities, Prepayments and Calls of Held-to-Maturity Securities Proceeds from the maturity of treasury securities Payments to Acquire Held-to-Maturity Securities Purchases of treasury securities us-gaap_NetCashProvidedByUsedInInvestingActivities Net cash used in investing activities Financing activities: us-gaap_ProceedsFromStockOptionsExercised Proceeds from exercise of stock options Cash received from stock option exercises us-gaap_NetCashProvidedByUsedInFinancingActivities Net cash provided by financing activities us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease Net decrease in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at end of year Cash and cash equivalents at beginning of year Supplemental Cash Flow Information [Abstract] Supplemental cash flow information: Income Taxes Paid, Net Cash paid (refunded) for income taxes CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY [Abstract] Statement [Table] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid In Capital [Member] Paid in Capital [Member] Retained Earnings [Member] Retained Earnings [Member] Statement [Line Items] Stock-based compensation expense, as restated Stock-based compensation expense Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Exercised, number of shares (in shares) Exercise of common stock options (in shares) Stock option exercises Exercise of common stock options DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract] Business Description and Accounting Policies [Text Block] DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS [Abstract] Accounting Standards Update and Change in Accounting Principle [Text Block] RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS REVENUE RECOGNITION [Abstract] Revenue from Contract with Customer [Text Block] REVENUE RECOGNITION INVESTMENTS [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] INVESTMENTS INVENTORIES [Abstract] Inventories [Text Block] INVENTORIES EQUIPMENT AND LEASEHOLD IMPROVEMENTS [Abstract] Property, Plant and Equipment Disclosure [Text Block] EQUIPMENT AND LEASEHOLD IMPROVEMENTS INCOME TAXES [Abstract] Income Tax Disclosure [Text Block] INCOME TAXES CREDIT FACILITY [Abstract] Debt Disclosure [Text Block] CREDIT FACILITY ACCRUED LIABILITIES [Abstract] Accounts Payable and Accrued Liabilities Disclosure [Text Block] ACCRUED LIABILITIES DEFERRED COMPENSATION [Abstract] Compensation Related Costs, General [Text Block] DEFERRED COMPENSATION LOSS PER COMMON SHARE [Abstract] Earnings Per Share [Text Block] LOSS PER COMMON SHARE STOCK OPTIONS [Abstract] Stock Options STOCK OPTIONS STOCK REPURCHASE PROGRAM [Abstract] Treasury Stock [Text Block] STOCK REPURCHASE PROGRAM LEASES [Abstract] Lessee, Operating Leases [Text Block] LEASES RELATED PARTY TRANSACTIONS [Abstract] Related Party Transactions Disclosure [Text Block] RELATED PARTY TRANSACTIONS EMPLOYEE BENEFIT PLANS [Abstract] Employee Benefit Plans EMPLOYEE BENEFIT PLANS CONCENTRATIONS [Abstract] Concentration Risk Disclosure [Text Block] CONCENTRATIONS SEGMENT INFORMATION [Abstract] Segment Reporting Disclosure [Text Block] SEGMENT INFORMATION LEGAL MATTERS [Abstract] Legal Matters and Contingencies [Text Block] LEGAL MATTERS SUBSEQUENT EVENTS [Abstract] Subsequent Events [Text Block] SUBSEQUENT EVENTS Nature of Operations [Text Block] NATURE OF BUSINESS Consolidation, Policy [Policy Text Block] BASIS OF PRESENTATION AND CONSOLIDATION Use of Estimates, Policy [Policy Text Block] USE OF ESTIMATES Revenue from Contract with Customer [Policy Text Block] REVENUE RECOGNITION Research and Development Expense, Policy [Policy Text Block] RESEARCH AND DEVELOPMENT Advertising Cost [Policy Text Block] ADVERTISING COSTS Income Tax, Policy [Policy Text Block] INCOME TAXES Disclosure of accounting policy for patent costs. Patent Costs [Policy Text Block] PATENT COSTS Earnings Per Share, Policy [Policy Text Block] LOSS PER COMMON SHARE Cash and Cash Equivalents, Policy [Policy Text Block] CASH AND CASH EQUIVALENTS Accounts Receivable [Policy Text Block] ACCOUNTS RECEIVABLE Prepaid Expenses And Other Current Assets Policy [Text Block] Prepaid Expenses And Other Current Assets Policy [Text Block] PREPAID EXPENSES AND OTHER CURRENT ASSETS Investment Policy [Text Block] INVESTMENTS Inventory, Policy [Policy Text Block] INVENTORIES Property, Plant and Equipment, Policy [Policy Text Block] EQUIPMENT AND LEASEHOLD IMPROVEMENTS Lessee, Leases [Policy Text Block] LEASES Life Insurance Policies [Policy Text Block] Life Insurance Policies [Policy Text Block] LIFE INSURANCE POLICIES Compensation Related Costs, Policy [Policy Text Block] DEFERRED COMPENSATION Fair Value of Financial Instruments, Policy [Policy Text Block] FAIR VALUE OF FINANCIAL INSTRUMENTS Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] IMPAIRMENT OF LONG-LIVED ASSETS Legal Costs, Policy [Policy Text Block] LEGAL COSTS Share-based Payment Arrangement [Policy Text Block] STOCK BASED COMPENSATION New Accounting Pronouncements, Policy [Policy Text Block] RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue Debt Securities, Held-to-Maturity [Table Text Block] Summary of Unrealized Positions for Held-to-Maturity Debt Securities Investments Classified by Contractual Maturity Date [Table Text Block] Summary of Held-to-Maturity Debt Securities by Contractual Maturity Schedule of Inventory, Current [Table Text Block] Components of Inventories Property, Plant and Equipment [Table Text Block] Summary of Major Categories of Equipment and Leasehold Improvements Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Components of Income Tax (Benefit) Provision Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Effective Income Tax Rate Reconciliation Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Income Tax Assets and Liabilities Summary of Valuation Allowance [Table Text Block] Schedule of Change in Valuation Allowance Schedule of Accrued Liabilities [Table Text Block] Schedule of Accrued Liabilities Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Reconciliation of Numerator and Denominator Used to Calculate Basic and Diluted Income (Loss) per Share Share-based Payment Arrangement, Option, Activity [Table Text Block] Stock Option Activity Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block] Intrinsic Value Schedule of Nonvested Share Activity [Table Text Block] Nonvested Option Activity Lease, Cost [Table Text Block] Lease Expense Lessee, Operating Lease, Liability, Maturity [Table Text Block] Future Minimum Lease Payments Schedule of Segment Reporting Information, by Segment [Table Text Block] Summary of Segment Information Accounting Policies Disclosure [Table] Accounting Policies Disclosure [Table] Accounting Policies Disclosure [Line Items] Accounting Policies Disclosure [Line Items] Ownership Percentage Ownership Percentage Ownership percentage Number Of Subsidiaries Number Of Subsidiaries Number of subsidiaries Research and Development Expense Research and development expense Advertising Expense Advertising expense Accounts Receivable, Allowance for Credit Loss, Writeoff Accounts receivable, allowance for credit loss, write-offs Accounts Receivable, Allowance for Credit Loss, Recovery Accounts receivable, allowance for credit loss, recoveries Debt Securities, Held-to-Maturity, Allowance for Credit Loss Allowance for credit losses, held-to-maturity debt securities Income Tax Receivable Income taxes receivable Impairment of Long-Lived Assets Held-for-use Impairments of long-lived assets Revenue, Remaining Performance Obligation, Percentage Remaining performance obligation, percentage Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Remaining performance obligation, period Number of Reportable Segments Number of reportable segments Disaggregation of Revenue [Table] Statistical Measurement [Axis] Range [Member] Statistical Measurement [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Product and Service [Axis] Products And Services [Domain] Product and Service [Domain] Domestic sales member Domestic Sales [Member] Domestic sales [Member] Export Sales Member Export Sales [Member] Export sales [Member] Disaggregation of Revenue [Line Items] us-gaap_ContractWithCustomerLiabilityRevenueRecognized Revenue recognized us-gaap_ContractWithCustomerLiability Deferred revenue liability Contract With Customer Liability Remaining Performance Obligation Expected Timing Of Satisfaction Period Contract With Customer Liability Remaining Performance Obligation Expected Timing Of Satisfaction Period Contract with customer liability remaining performance obligation expected timing of satisfaction period Geographical [Axis] Segment Geographical [Domain] Geographical [Domain] U [S] United States [Member] Non Us [Member] Export [Member] Debt Securities, Held-to-Maturity [Table] Financial Instrument [Axis] Transfers And Servicing Of Financial Instruments Types Of Financial Instruments [Domain] Financial Instruments [Domain] U S Treasury Securities [Member] US Treasury Securities [Member] Schedule of Held-to-Maturity Securities [Line Items] Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss Amortized cost basis Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain Gross unrealized gains Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss Gross unrealized losses Debt Securities, Held-to-Maturity, Fair Value Fair Value Fair Value Debt Securities, Available-for-Sale, Amortized Cost, Rolling Maturity [Abstract] Amortized cost basis Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, Year One Due within one year Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, Allocated and Single Maturity Date, after Year One through Five Due after one year through five years Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] Fair Value Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Due within one year Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Due after one year through five years Raw materials Finished goods us-gaap_InventoryGross Inventories, gross us-gaap_InventoryValuationReserves Reserve for obsolete inventory Property, Plant and Equipment [Table] Long-Lived Tangible Asset [Axis] Property Plant And Equipment Type [Domain] Long-Lived Tangible Asset [Domain] Machinery And Equipment [Member] Machinery and Equipment [Member] Furniture And Fixtures [Member] Furniture and Office Equipment [Member] Tooling [Member] Tooling [Member] Tooling [Member] Computer Equipment [Member] Computer & Technology Equipment [Member] Leasehold Improvements [Member] Leasehold Improvements [Member] Asset Under Construction [Member] Assets in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment, Useful Life Estimated useful lives (in years) Property, Plant and Equipment, Gross Property, plant and equipment, gross Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: accumulated depreciation and amortization Income Tax Disclosure [Table] Income Tax Disclosure [Table] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Domestic Country [Member] Federal [Member] State And Local Jurisdiction [Member] State and Local Jurisdiction [Member] Income Tax Authority, Name [Axis] Income Tax Authority Name [Domain] Income Tax Authority, Name [Domain] Wisconsin Department of Revenue [Member] Wisconsin Department Of Revenue [Member] Wisconsin Department of Revenue [Member] Other States [Member] Other States [Member] Other States [Member] Income Tax Disclosure [Line Items] Income Tax Disclosure [Line Items] Uncertain Tax Position Related To Research And Development Costs Uncertain Tax Position Related To Research And Development Costs Uncertainty tax position related to research and development costs Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount Return-to-provision adjustment Amount of operating loss carryforwards that are subject to expiration dates. Operating Loss Carryforwards, Subjext to Expiration Operating loss carryforwards, subject to expiration Amount of operating loss carryforwards that are not subject to expiration dates. Operating Loss Carryforwards, Not Subject to Expiration Operating loss carryforwards, not subject to expiration Operating Loss Carryforwards Operating loss carryforwards Income Tax Examination, Penalties and Interest Expense Interest and penalties Unrecognized Tax Benefits Unrecognized tax benefits Current Federal Tax Expense (Benefit) Current: Federal Federal tax benefit Current State and Local Tax Expense (Benefit) Current: State Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Federal income tax benefit at statutory rate Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount State income tax liability, net of federal income tax effect Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Increase in valuation allowance Effective Income Tax Rate Reconciliation, (Deduction) Addback, Employee Stock Ownership Plan Dividend, Amount Effective Income Tax Rate Reconciliation, (Deduction) Addback, Employee Stock Ownership Plan Dividend, Amount Stock option (deduction) Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount All other permanent items Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount R&D credit Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to adjustment to deferred tax assets. Effective Income Tax Rate Reconciliation, Adjustment To Deferred Tax Assets, Amount Deferred adjustment related to payroll tax withholding on disqualifying disposition of incentive stock options Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount State tax rate change Income Tax Reconciliation Uncertain Tax Position Income Tax Reconciliation Uncertain Tax Position Uncertain tax position Income Tax Reconciliation, Adjustment Related To State Net Operating Loss Income Tax Reconciliation, Adjustment Related To State Net Operating Loss Deferred adjustment related to state net operating loss Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Other Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits Deferred compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Accrued expenses and reserves Deferred Tax Assets, Deferred Income Deferred revenue Deferred Tax Assets, Operating Loss Carryforwards Federal and state net operating loss carryforwards Deferred Tax Assets, in Process Research and Development IRC Section 174 research and development costs Deferred Tax Assets, Tax Credit Carryforwards Credit carryforwards Deferred Tax Assets, Property, Plant and Equipment Equipment and leasehold improvements Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Operating lease liability Deferred Tax Assets, Valuation Allowance Valuation allowance Balance, end of year Balance, beginning of year Deferred Tax Assets, Net of Valuation Allowance Total deferred income tax assets Deferred Tax Liabilities, Leasing Arrangements Operating right-of-use asset Deferred Tax Liabilities, Other Other Deferred Tax Liabilities, Gross Total deferred income tax liabilities Deferred Tax Assets, Net Net deferred income tax assets Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Decrease (Increase) in valuation allowance Line of Credit Facility [Table] Lender Name [Axis] Line Of Credit Facility Lender [Domain] Line of Credit Facility, Lender [Domain] Represents Town Bank. Town Bank [Member] Town Bank [Member] Debt Instrument [Axis] Debt Instrument Name [Domain] Debt Instrument, Name [Domain] Represents the "Credit Agreement". Credit Agreement [Member] Credit Agreement [Member] Amended Credit Agreement [Member] Amended Credit Agreement [Member] Amended Credit Agreement [Member] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Line of Credit Facility [Line Items] us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Maximum borrowing capacity us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage Unused line fees us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Spread on variable interest rate Line Of Credit Outstanding borrowings Interest Expense, Debt Interest expense Short term (less than one year) liability accrued as of the balance sheet date for cooperative advertising with customers, allowances as a percentage of sales to be taken against future payments, volume rebate accruals to be paid out shortly after fiscal year end, and various promotion allowances including but not limited to programs such as inclusion of our product in a customer's print ads, opening of new stores of an established customer, and initial purchase with a new customer to stock their various locations. Cooperative Advertising And Promotion Allowances Cooperative advertising and promotion allowances Customer Refund Liability, Current Customer credit balances Accrued Employee Benefits, Current Employee benefits Accrued Professional Fees, Current Legal and professional fees Accrued Bonuses, Current Bonus and profit-sharing Accrued Sales Commission, Current Sales commissions Accrued Sales Returns Reserve Accrued Sales Returns Reserve Sales returns Accrued Volume Incentive Rebates Accrued Volume Incentive Rebates Volume incentive rebates Other Accrued Liabilities, Current Other Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table] Title of Individual [Axis] Title Of Individual With Relationship To Entity [Domain] Title of Individual [Domain] Officer [Member] Current Officer [Member] Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Discount factor Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Life Expectancy Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Life Expectancy Life expectancy Deferred Compensation Arrangement with Individual, Recorded Liability Deferred compensation recorded liability Deferred Compensation Arrangement with Individual, Compensation Expense Deferred compensation expense Deferred Compensation Arrangement with Individual, Cash Compensation, Percentage Of Base Salary Deferred Compensation Arrangement with Individual, Cash Compensation, Percentage Of Base Salary Cash compensation, percentage of base salary Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive shares Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Ten Percent Stockholder [Member] Ten Percent Stockholder [Member] 10% Stockholder [Member] Vesting [Axis] Vesting [Domain] Vesting [Domain] Share Based Compensation Award Tranche One [Member] Three to Five Years [Member] Award Type [Axis] Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain] Award Type [Domain] Employee Stock Option [Member] Employee Stock Option Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Equity Incentive Plan, 2023 [Member] Equity Incentive Plan2023 [Member] 2023 Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Shares available for grant Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1 Vesting period Share based Compensation Arrangement By Share based Payment Award Expiration Period Expiration period us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) us-gaap_StockOptionPlanExpense Stock or Unit Option Plan Expense Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Beginning Balance Shares under option, number of shares (in shares) Shares under option, number of shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period Expired, number of shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period Forfeited, number of shares (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Exercisable, number of shares (in shares) Share-based Compensation Arrangements by Share-based Payment Award, Options, Outstanding, Exercise Price, Lower Limit Sharebased Compensation Arrangements By Sharebased Payment Award Options Outstanding Exercise Price Lower Limit Shares under option, stock options price range, lower limit (in dollars per share) Shares under option, stock options price range, lower limit (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Outstanding, Exercise Price, Upper Limit Sharebased Compensation Arrangements By Sharebased Payment Award Options Outstanding Exercise Price Upper Limit Shares under option, stock options price range, upper limit (in dollars per share) Shares under option, stock options price range, upper limit (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Exercise Price, Lower Limit Sharebased Compensation Arrangements By Sharebased Payment Award Options Exercises In Period Exercise Price Lower Limit Exercised, stock options price range, lower limit (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Exercise Price, Upper Limit Sharebased Compensation Arrangements By Sharebased Payment Award Options Exercises In Period Exercise Price Upper Limit Exercised, stock options price range, upper limit (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Exercise Price, Lower Limit Sharebased Compensation Arrangements By Sharebased Payment Award Options Expirations In Period Exercise Price Lower Limit Expired, stock options price range, lower limit (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Exercise Price, Lower Limit Sharebased Compensation Arrangements By Sharebased Payment Award Options Forfeitures In Period Exercise Price Lower Limit Forfeited, stock options price range, lower limit (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercisable, Exercise Price, Lower Limit Sharebased Compensation Arrangements By Sharebased Payment Award Options Exercisable Exercise Price Lower Limit Exercisable, stock options price range, lower limit (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercisable, Exercise Price, Upper Limit Sharebased Compensation Arrangements By Sharebased Payment Award Options Exercisable Exercise Price Upper Limit Exercisable, stock options price range, upper limit (in dollars per share) Shares Under Option, Weighted Average Exercise Price (In Dollars Per Share) Shares under option, weighted average exercise price (in dollars per share) Shares under option, weighted average exercise price (in dollars per share) Exercised, Weighted Average Exercise Price (In Dollars Per Share) Exercised, weighted average exercise price (in dollars per share) Expired, Weighted Average Exercise Price (In Dollars Per Share) Expired, weighted average exercise price (in dollars per share) Forfeited, Weighted Average Exercise Price (In Dollars Per Share) Forfeited, weighted average exercise price (in dollars per share) Exercisable, Weighted Average Exercise Price (In Dollars Per Share) Exercisable, weighted average exercise price (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Shares under option, weighted average remaining contractual life (Year) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercisable, weighted average remaining contractual life (Year) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Shares under option, aggregate intrinsic value of in-the-money options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Exercisable, aggregate intrinsic value of in-the-money options Total intrinsic value of stock options exercised Total fair value of stock options vested Total recognized tax benefit us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares Non-vested (in shares) Non-vested (in shares) us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares Vested (in shares) us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares Forfeited (in shares) us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue Non-vested, weighted average grant date fair value (in dollars per share) Non-vested, weighted average grant date fair value (in dollars per share) us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue Vested, weighted average grant date fair value (in dollars per share) us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue Forfeited, weighted average grant date fair value (in dollars per share) Note To Financial Statement Details Textual Note To Financial Statement Details Textual Share Repurchase Program [Table] Share Repurchase Program [Line Items] Share Repurchase Program, Authorized, Amount Stock repurchase program, amount authorized Payments for Repurchase of Common Stock Payments for repurchase of common stock Lessee, Lease, Description [Table] Lease Contractual Term [Axis] Lease Contractual Term [Domain] Lease Contractual Term [Domain] Additional Renewal [Member] Additional Renewal [Member] Additional Renewal [Member] Lessee, Lease, Description [Line Items] us-gaap_LesseeOperatingLeaseRenewalTerm Lease renewal term Lease Extension Per Year Lease Extension Per Year Lease extension per year Operating lease cost us-gaap_OperatingLeasePayments Operating cash flows from operating leases Weighted-average remaining lease term (in years) Weighted-average discount rate Lessee, Operating Lease, Liability, to be Paid, Year One 2026 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo 2027 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree 2028 2026 2029 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive 2030 us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive Thereafter us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue Total lease payments us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount Present value adjustment us-gaap_OperatingLeaseLiability Total lease liabilities Koss Employee Stock Ownership Trust [Member] Koss Employee Stock Ownership Trust [Member] Koss Employee Stock Ownership Trust [Member] Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] Defined Contribution Plan, Cost Company contributions Defined Contribution Plan, Employer Matching Contribution, Percent of Match Matching contributions, percent Employee Stock Ownership Plan (ESOP), Cash Contributions to ESOP Contributions Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Geographic Concentration Risk [Member] Geographic Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts Receivable [Member] Accounts Receivable [Member] Sales Revenue Net [Member] Revenue Benchmark [Member] Trade Accounts Receivable [Member] Trade Accounts Receivable [Member] Manufacturing Costs Benchmark Member Manufacturing Costs Benchmark [Member] Manufacturing Costs Benchmark [Member] Customer [Axis] Name Of Major Customer [Domain] Customer [Domain] Access Catalog [Member] Access Catalog [Member] Access Catalog [Member] Five Largest Clients Member Five Largest Clients [Member] Five Largest Clients [Member] Amazon Member Amazon [Member] Amazon [Member] Ingram Micro Member Ingram Micro [Member] Ingram Micro [Member] Computer Supply People Member Computer Supply People [Member] The Computer Supply People [Member] Foreign Member Foreign [Member] Foreign [Member] C [N] China [Member] Supplier [Axis] Share Based Goods And Nonemployee Services Transaction Supplier [Domain] Supplier [Domain] Vendor One [Member] Vendor One [Member] Vendor One [Member] Concentration Risk [Line Items] Number Of Major Customers Number Of Major Customers Number of major customers us-gaap_ConcentrationRiskPercentage1 Concentration risk percentage Number Of Major Vendors Number Of Major Vendors Number of major vendors Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Gross Profit, Percentage Gross Profit, Percentage Gross profit margin New Product Certification And Compliance Testing New Product Certification And Compliance Testing New product certification and compliance testing Legal And Professional Fees Legal And Professional Fees Legal and professional fees Other Selling, General and Administrative Expense Other selling general and administrative expenses Loss Contingencies [Table] Loss Contingencies [Line Items] Loss Contingency, Estimate of Possible Loss Estimate of loss Loss Contingency Accrual Accrual Subsequent Event [Table] Lessee, Finance Lease, Term of Contract Finance lease, term Lessee, Finance Lease, Monthly Payment Amount Lessee, Finance Lease, Monthly Payment Amount Finance lease, monthly payment Lessee, Finance Lease, Purchase Option, Amount Lessee, Finance Lease, Purchase Option, Amount Finance lease, purchase option, amount Finance Lease, Right-of-Use Asset, after Accumulated Amortization Finance lease, right of use asset Finance Lease, Liability Finance lease, liability Lessee, Finance Lease, Discount Rate Finance lease, discount rate Insider Trading Policies and Procedures [Line Items] Insider Trading Policies and Procedures Adopted [Flag] Insider Trading Policies and Procedures Adopted Cybersecurity Risk Management, Strategy, and Governance [Abstract] Cybersecurity Risk Management, Strategy, and Governance [Line Items] Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] Cybersecurity Risk Management Processes Integrated [Flag] Cybersecurity Risk Management Processes Integrated [Text Block] Cybersecurity Risk Management Third Party Engaged [Flag] Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block] Cybersecurity Risk Board of Directors Oversight [Text Block] Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] Cybersecurity Risk Role of Management [Text Block] Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Koss UK [Member] Koss Uk [Member] Koss UK [Member] Koss Corp B.V. [Member] Koss Corp B.v. [Member] Koss Corp B.V. [Member] Revision of Prior Period [Axis] Restatement [Domain] Revision of Prior Period [Domain] Revision Of Prior Period Reclassification Adjustment [Member] Adjustment [Member] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Koss Stock Repurchase Program [Member] Koss Stock Repurchase Program [Member] Koss Stock Repurchase Program [Member] Segments [Axis] Segment [Domain] Segments [Domain] Headphones and Related Accessories [Member] Headphones And Related Accessories [Member] Headphones and Related Accessories [Member] Reach Truck Lease, 36 Months [Member] Reach Truck Lease36 Months [Member] 36-Month Reach Truck Lease [Member] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] Awards Close in Time to MNPI Disclosures [Line Items] Awards Close in Time to MNPI Disclosures [Table]