Cover [Abstract] Document Type Document Quarterly 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 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 Entity Shell Company Entity Common Stock, Shares Outstanding (in shares) Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Period Focus Entity Central Index Key Entity Central Index Key Amendment Flag Amendment Flag Condensed 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, less allowance for credit losses of $1,922 and $6,027, respectively Inventories, net Inventories Inventories, net Prepaid expenses and other current assets Prepaid expenses and other current assets Interest Receivable, Current Interest receivable Income taxes receivable us-gaap_AssetsCurrent Total current assets Total current assets 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 assets Total assets Current liabilities: Accounts payable Accrued Liabilities, Current Accrued liabilities us-gaap_ContractWithCustomerLiabilityCurrent Deferred revenue us-gaap_OperatingLeaseLiabilityCurrent Operating lease liability Taxes Payable, Current Income taxes payable us-gaap_LiabilitiesCurrent Total current liabilities 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 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 9,254,795 and 9,234,795, respectively Paid in capital Retained earnings Retained earnings us-gaap_StockholdersEquity Balance Balance Total stockholders' equity Total stockholders' equity us-gaap_LiabilitiesAndStockholdersEquity Total liabilities and stockholders' equity Accounts receivable, allowance for doubtful accounts 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) Condensed 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 (Loss) from operations Other Nonoperating Income (Expense) Other income Interest income us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments (Loss) income before income tax provision (benefit) (Loss) income before income tax provision Income Tax Expense (Benefit) Income tax provision (benefit) Net income (loss) Net (loss) income Net (loss) income Net income (loss) Earnings Per Share Basic And Diluted 1 [Abstract] Earnings Per Share Basic And Diluted 1 [Abstract] (Loss) income 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) Condensed Consolidated Statements of Cash Flows [Abstract] Operating activities: Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: (Recovery of) provision for doubtful accounts of accounts receivable (Recovery of) Provision for credit losses Depreciation of equipment and leasehold improvements Amortization of discount on treasury securities Amortization of discount on treasury securities 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 Gain (Loss) on Disposition of Property Plant Equipment Loss on disposal of fixed assets 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 provided by operating activities Net cash (used in) provided by 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 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 period Cash and cash equivalents at beginning of period Supplemental Cash Flow Information [Abstract] Supplemental cash flow information: Income Taxes Paid, Net Cash paid for income taxes Condensed 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 Exercise of common stock options (in shares) Stock option exercises (in shares) Stock option exercises Stock option exercises Summary of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Investments [Abstract] Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments Inventories [Abstract] Inventories [Text Block] Inventories Credit Facility [Abstract] Debt Disclosure [Text Block] Credit Facility Revenue Recognition [Abstract] Revenue from Contract with Customer [Text Block] Revenue Recognition (Loss) Income per Common and Common Stock Equivalent Share [Abstract] Earnings Per Share [Text Block] (Loss) Income per Common and Common Stock Equivalent Share Related Party Transactions [Abstract] Related Party Transactions Disclosure [Text Block] Related Party Transactions Accounts Receivable Concentrations [Abstract] Concentration Risk Disclosure [Text Block] Accounts Receivable Concentrations Employee Stock Ownership Plan [Abstract] Employee Stock Ownership Plan Stock-Based Compensation [Abstract] Stock-Based Compensation Legal Matters [Abstract] Legal Matters and Contingencies [Text Block] Legal Matters Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Investment Policy [Text Block] Investments Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value Measurements Income Tax, Policy [Policy Text Block] Income Taxes Legal Costs, Policy [Policy Text Block] Legal Costs Debt, Policy [Policy Text Block] Other Income Compensation Related Costs, Policy [Policy Text Block] Deferred Compensation New Accounting Pronouncements, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] Effect of Revision of Financial Statements Schedule of Deferred Tax Assets and Liabilities 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 Disaggregation of Revenue [Table Text Block] Disaggregation of Revenue Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Reconciliation of Numerator and Denominator Used to Calculate Basic and Diluted (Loss) Income per Share Accounting Policies Disclosure [Table] Accounting Policies Disclosure [Table] Title of Individual [Axis] Title Of Individual With Relationship To Entity [Domain] Title of Individual [Domain] Officer [Member] Current Officer [Member] 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] Accounting Policies Disclosure [Line Items] Accounting Policies Disclosure [Line Items] Effective Income Tax Rate Reconciliation, Percent Effective tax rate Other Income Other income Proceeds from License Fees Received Licensing proceeds Tax Credit Carryforward, Amount Tax loss carryforward Deferred Compensation Liability, Current and Noncurrent Deferred compensation liability Deferred Compensation Arrangement with Individual, Compensation Expense Deferred compensation expense (income) Debt Securities, Held-to-Maturity, Allowance for Credit Loss Allowance for credit losses, held-to-maturity debt securities 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 Lease liability Deferred Tax Assets, Valuation Allowance Valuation allowance Deferred Tax Assets, Net of Valuation Allowance Total deferred income tax assets Deferred Tax Liabilities, Leasing Arrangements ROU asset Deferred Tax Liabilities, Other Other Deferred Tax Liabilities, Gross Total deferred income tax liabilities Deferred Tax Assets, Net Net deferred income tax assets 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 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 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] Line of Credit Facility [Line Items] us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity Maximum borrowing capacity Line Of Credit Facility, Maximum Borrowing Capacity Per Letter of Credit Line Of Credit Facility, Maximum Borrowing Capacity Per Letter of Credit Maximum borrowing capacity per letter of credit us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage Unused line fees us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Spread on variable interest rate Line Of Credit Outstanding borrowings 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] Revenue, Remaining Performance Obligation, Percentage Remaining performance obligation, percentage us-gaap_ContractWithCustomerLiabilityRevenueRecognized Revenue recognized 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] us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements Dilutive effect of stock compensation awards (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive shares Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Line Items] us-gaap_LesseeOperatingLeaseRenewalTerm Lease renewal term Lease Extension Per Year Lease Extension Per Year Related party transaction amount Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts Receivable [Member] Accounts Receivable [Member] Customer [Axis] Name Of Major Customer [Domain] Customer [Domain] Customer One [Member] Customer One [Member] Customer One [Member] Customer Two [Member] Customer Two [Member] Customer Two [Member] Customer Three [Member] Customer Three [Member] Customer Three [Member] Concentration Risk [Line Items] Number Of Major Customers Number Of Major Customers Number of major customers us-gaap_ConcentrationRiskPercentage1 Concentration risk percentage Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] Employee Stock Ownership Plan (ESOP), Cash Contributions to ESOP Contributions 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 Loss Contingencies [Table] Loss Contingencies [Line Items] Legal Fees Legal fees and related expenses Loss Contingency, Estimate of Possible Loss Estimate of loss Error Correction, Type [Axis] Adjustments For Error Correction [Domain] Error Correction, Type [Domain] Over Withheld Taxes [Member] Over Withheld Taxes [Member] Over Withheld Taxes [Member] Revision of Prior Period [Axis] Restatement [Domain] Revision of Prior Period [Domain] Scenario Previously Reported [Member] As Previously Reported [Member] Restatement Adjustment [Member] Revision [Member] Lease Contractual Term [Axis] Lease Contractual Term [Domain] Lease Contractual Term [Domain] Additional Renewal [Member] Additional Renewal [Member] Additional Renewal [Member] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Koss Employee Stock Ownership Trust [Member] Koss Employee Stock Ownership Trust [Member] Koss Employee Stock Ownership Trust [Member] 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] Options [Member] Equity Incentive Plan, 2023 [Member] Equity Incentive Plan2023 [Member] 2023 Plan [Member]