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Condensed Consolidated Balance Sheets (Parentheticals) - USD ($)	Mar. 31, 2024	Jun. 30, 2023
Condensed Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 1,922	$ 6,027
Common stock, par value (in dollars per share)	$ 0.005	$ 0.005
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	9,254,795	9,234,795
Common stock, shares outstanding (in shares)	9,254,795	9,234,795

Accounts Receivable Concentrations	9 Months Ended
Mar. 31, 2024
Accounts Receivable Concentrations [Abstract]
Accounts Receivable Concentrations	8. ACCOUNTS RECEIVABLE CONCENTRATIONS As of March 31, 2024, the Company’s top three accounts receivable customers represented approximately 25%, 12% and 10% of trade accounts receivable. The top three accounts receivable customers as of June 30, 2023 represented approximately 24%, 14% and 13%.

Accounts Receivable Concentrations

9 Months Ended

Mar. 31, 2024

Accounts Receivable Concentrations [Abstract]

Accounts Receivable Concentrations

8. ACCOUNTS RECEIVABLE CONCENTRATIONS

As of March 31, 2024, the Company’s top three accounts receivable customers represented approximately 25%, 12% and 10% of trade accounts receivable. The top three accounts receivable customers as of June 30, 2023 represented approximately 24%, 14% and 13%.

Summary of Significant Accounting Policies (Tables)

9 Months Ended

Mar. 31, 2024

Summary of Significant Accounting Policies [Abstract]

Effect of Revision of Financial Statements

The following tables present the effect of the revision on the condensed consolidated balance sheet as of June 30, 2023, the condensed consolidated statements of operations for the three and nine months ended March 31, 2023, and the condensed consolidated statement of cash flows for the nine months ended March 31, 2023.


	As of June 30, 2023
	As Previously Reported	Revision	As Revised
Condensed consolidated balance sheet:
Prepaid expenses and other current assets	284,622	717,892	1,002,514
Total current assets	28,380,967	717,892	29,098,859
Total assets	38,370,805	717,892	39,088,697
Accrued liabilities	970,530	371,509	1,342,039
Total current liabilities	2,011,817	371,509	2,383,326
Total liabilities	6,909,910	371,509	7,281,419
Retained earnings	18,300,728	346,383	18,647,111
Total stockholders' equity	31,460,895	346,383	31,807,278


	Three Months Ended March 31, 2023			Nine Months Ended March 31, 2023
	As Previously Reported	Revision	As Revised	As Previously Reported	Revision	As Revised
Condensed consolidated statements of operations:
Selling, general and administrative expenses	1,757,714	(8,373)	1,749,341	27,921,287	(14,041)	27,907,246
(Loss) from operations	(453,356)	8,373	(444,983)	(24,285,543)	14,041	(24,271,502)
(Loss) income before income tax provision	(263,763)	8,373	(255,390)	9,028,939	14,041	9,042,980
Net (loss) income	(232,853)	8,373	(224,480)	8,565,011	14,041	8,579,052
(Loss) income per common share:
Basic	(0.03)		(0.02)	0.93		0.93
Diluted	(0.03)		(0.02)	0.87		0.88


	Nine Months Ended March 31, 2023
	As Previously Reported	Revision	As Revised
Condensed consolidated statement of cash flows:
Net income	8,565,011	14,041	8,579,052
Prepaid expenses and other current assets	(205,710)	(28,082)	(233,792)
Accrued liabilities	310,466	14,041	324,507
Net cash provided by operating activities	10,616,726	(0)	10,616,726

The effect of this revision on the opening balances within the Company's condensed consolidated statements of stockholders' equity for the three and nine months ended March 31, 2024 and 2023 was as follows:


	As Previously Reported	Revision	As Revised
Retained earnings, June 30, 2022	9,998,348	329,551	10,327,899
Total stockholders' equity, June 30, 2022	22,697,489	329,551	23,027,040

Retained earnings, December 31, 2022	18,796,212	335,219	19,131,431
Total stockholders' equity, December 31, 2022	31,751,001	335,219	32,086,220

Retained earnings, June 30, 2023	18,300,728	346,383	18,647,111
Total stockholders' equity, June 30, 2023	31,460,895	346,383	31,807,278

Schedule of Deferred Tax Assets and Liabilities


	March 31, 2024		June 30, 2023
Deferred income tax assets:
Deferred compensation	$	516,932	$	491,608
Stock-based compensation		77,530		117,607
Accrued expenses and reserves		524,892		571,719
Deferred revenue		100,973		138,665
Federal and state net operating loss carryforwards		8,456,728		8,216,671
IRC Section 174 research and development costs		113,521		63,855
Credit carryforwards		188,893		169,552
Equipment and leasehold improvements		130,637		136,294
Lease liability		684,670		744,431
Valuation allowance		(10,093,269)		(9,906,018)
Total deferred income tax assets		701,507		744,384

Deferred income tax liabilities:
ROU asset		(680,737)		(742,386)
Other		(20,770)		(1,998)
Total deferred income tax liabilities		(701,507)		(744,384)
Net deferred income tax assets	$	-	$	-

Summary of Significant Accounting Policies (Effect of Revision of Consolidated Statements of Changes in Stockholders Equity) (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022
Stockholders' equity:
Retained earnings	$ 17,806,569		$ 18,647,111		$ 19,131,431	$ 10,327,899
Total stockholders' equity	$ 31,122,473	$ 31,400,356	31,807,278	$ 31,987,110	32,086,220	23,027,040
As Previously Reported [Member]
Stockholders' equity:
Retained earnings			18,300,728		18,796,212	9,998,348
Total stockholders' equity			31,460,895		31,751,001	22,697,489
Revision [Member]
Stockholders' equity:
Retained earnings			346,383		335,219	329,551
Total stockholders' equity			$ 346,383		$ 335,219	$ 329,551

- Definition

Amount of accumulated undistributed earnings (deficit).

+ References + Details

- Definition

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

+ References

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+ Details

Revenue Recognition (Narrative) (Details) - USD ($)	9 Months Ended
Revenue Recognition (Narrative) (Details) - USD ($)	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue recognized	$ 264,251	$ 284,584
Domestic sales [Member]
Disaggregation of Revenue [Line Items]
Remaining performance obligation, percentage	3.00%		2.40%
Export sales [Member]
Disaggregation of Revenue [Line Items]
Remaining performance obligation, percentage	8.00%		10.00%
Minimum [Member]
Disaggregation of Revenue [Line Items]
Contract with customer liability remaining performance obligation expected timing of satisfaction period	1 year
Maximum [Member]
Disaggregation of Revenue [Line Items]
Contract with customer liability remaining performance obligation expected timing of satisfaction period	3 years

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Inventories (Components of Inventories) (Details) - USD ($)	Mar. 31, 2024	Jun. 30, 2023
Inventories [Abstract]
Raw materials	$ 2,011,332	$ 2,071,360
Finished goods	4,519,572	6,178,186
Inventories, gross	6,530,904	8,249,546
Reserve for obsolete inventory	(1,869,899)	(1,826,105)
Inventories, net	$ 4,661,005	$ 6,423,441

Stock-Based Compensation (Narrative) (Details) - 2023 Plan [Member]	9 Months Ended
	Mar. 31, 2024 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant	2,000,000
Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Minimum [Member] \| Three to Five Years [Member] \| Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Maximum [Member] \| Three to Five Years [Member] \| Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
10% Stockholder [Member] \| Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	5 years

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Mar. 31, 2024

Summary of Significant Accounting Policies [Abstract]

Basis of Presentation

A) BASIS OF PRESENTATION

The condensed consolidated balance sheets as of March 31, 2024 and June 30, 2023, the condensed consolidated statements of operations for the three and nine months ended March 31, 2024 and 2023, the condensed consolidated statements of cash flows for the nine months ended March 31, 2024 and 2023, and the condensed consolidated statements of stockholders' equity for the three and nine months ended March 31, 2024 and 2023, have been prepared by the Company in accordance with generally accepted accounting principles in the United States of America (“U.S. GAAP”) and have not been audited. In the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary to present fairly the financial position, results of operations and cash flows for all periods presented have been made. The operating results for any interim period are not necessarily indicative of the operating results that may be experienced for the full fiscal year.

Certain information and footnote disclosures normally included in consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. These condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2023.

The preparation of financial statements in conformity with U.S. GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses. Significant estimates and assumptions are used for, but are not limited to, allowances for credit losses, reserves for excess and obsolete inventories, long-lived and intangible assets, income tax valuation allowance, stock-based compensation and deferred compensation. Actual results could differ from the Company's estimates.

Investments

C) INVESTMENTS

Debt securities are classified as held-to-maturity as the Company has the positive intent and ability to hold them to maturity. The securities are carried at amortized cost as current or noncurrent based upon maturity date and unrealized gains and losses are recognized when realized. The amortized cost of debt securities is adjusted for amortization of premium and accretion of discounts to maturity. Such amortization or accretion is included in interest income, along with other interest on cash and cash equivalents.

Fair Value Measurements

D) FAIR VALUE MEASUREMENTS

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an ordinary transaction between market participants at the measurement date. A three-tier hierarchy prioritizes the inputs used in measuring fair value. These tiers include Level 1, defined as observable inputs such as quoted market prices in active markets; Level 2, defined as inputs other than quoted market prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore, requiring an entity to develop its own assumptions. The asset's or liability's fair value measurement within the hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

The Company’s U.S. treasury debt securities are recorded at amortized cost with fair value disclosure. They have a readily available market price (Level 1 input), thus a lesser degree of judgment needs to be used in measuring fair value, and fair value was determined by quoted market prices.

Income Taxes

E) INCOME TAXES

We estimate a provision for income taxes based on the effective tax rate expected to be applicable for the fiscal year. If the actual results are different from these estimates, adjustments to the effective tax rate may be required in the period such determination is made. Additionally, discrete items are treated separately from the effective rate analysis and are recorded separately as an income tax provision or benefit at the time they are recognized.

During the three and nine months ended March 31, 2024, a state income tax provision of $1,522 and $5,281 was recorded for the minimum tax payments expected given the taxable net losses in those periods. During the three and nine months ended March 31, 2024, a federal tax benefit of $82,653 was recorded as a result of the return-to-provision (RTP) adjustments recorded in the period identified. The adjustments were identified when the prior year tax returns were filed in the third quarter of fiscal year 2024. For the nine months ended March 31, 2023, as a result of additional income generated by licensing fees, offset by related legal fees and expenses, taxable income for the period was generated. For NOLs arising in tax years beginning after December 31, 2017, the Tax Cuts and Jobs Act (“TCJA”) limits the NOL deduction to 80 percent of taxable income. As such, the utilization of the Company’s net operating loss carryforwards from fiscal years after 2018 is limited to 80 percent of the resulting taxable income. Utilization of net operating loss carryforwards significantly reduced the taxable income for the nine-month period ended March 31, 2023, resulting in federal and state tax provisions of $374,714 and $89,214, respectively. For the three months ended March 31, 2023, a state income tax benefit of $30,910 was recorded mainly as a result of an update to state apportionment percentages. No federal tax benefit or provision was recorded for that quarter.

The effective tax rate was less than 1%, excluding the RTP adjustments, for the nine months ended March 31, 2024 and 5.1% for the nine months ended March 31, 2023. It is anticipated that the effective rate in the current year and future years will continue to be reduced by utilization of a portion or all of the federal and state net operating loss carryforwards that existed as of June 30, 2023. The Company's taxable loss generated during the first nine months of fiscal year 2024 increased the tax loss carryforward as of March 31, 2024 to approximately $32,800,000. Given the taxable loss for the nine-month period, the expectation for utilization of the estimated tax loss carryforward is lessened, and as such, the future realization of this continues to be uncertain. The valuation allowance was adjusted to continue to fully offset the net deferred tax asset as there is sufficient negative evidence to support a full valuation allowance.

‎

Temporary differences which give rise to deferred income tax assets and liabilities at March 31, 2024 and June 30, 2023 include:


	March 31, 2024		June 30, 2023
Deferred income tax assets:
Deferred compensation	$	516,932	$	491,608
Stock-based compensation		77,530		117,607
Accrued expenses and reserves		524,892		571,719
Deferred revenue		100,973		138,665
Federal and state net operating loss carryforwards		8,456,728		8,216,671
IRC Section 174 research and development costs		113,521		63,855
Credit carryforwards		188,893		169,552
Equipment and leasehold improvements		130,637		136,294
Lease liability		684,670		744,431
Valuation allowance		(10,093,269)		(9,906,018)
Total deferred income tax assets		701,507		744,384

Deferred income tax liabilities:
ROU asset		(680,737)		(742,386)
Other		(20,770)		(1,998)
Total deferred income tax liabilities		(701,507)		(744,384)
Net deferred income tax assets	$	-	$	-

Legal Costs

F) LEGAL COSTS

All legal costs related to litigation for which the Company is liable, are charged to operations as incurred, except contingent legal fees as described below. Proceeds from the settlement of disputes are recorded in other income when the amounts are determinable, and collection is certain. Related license proceeds are considered functional and as such are recorded at a point in time, based on the underlying agreement. Related contingent legal fees and expenses are recorded in selling, general and administrative expense at that time. The contingent legal fee expenses could have a material effect on the results of operations, however, timing and impact is uncertain and is dependent on the resolution of related litigation.

Other Income

G) OTHER INCOME

No other income was received in the three and nine months ended March 31, 2024. In the three and nine months ending March 31, 2023, the Company received licensing proceeds of $0 and $33,000,000, respectively, which was recorded as other income.

Other income is shown as a separate line on the condensed consolidated statements of operations.

Deferred Compensation

H) DEFERRED COMPENSATION

The Company’s deferred compensation liability is for a current officer and is calculated based on years of service and compensation, along with various assumptions related to expected retirement date, discount rates, and mortality tables. The related expense is calculated using the net present value of the expected payments and is included in selling, general and administrative expenses in the condensed consolidated statements of operations. The deferred compensation liability recorded at March 31, 2024 and June 30, 2023 is $2,110,507 and $1,997,120, respectively. The increase in the deferred compensation liability for the current officer, and thus the compensation expense recorded during the nine months ended March 31, 2024, was due mainly to the annual increase in the future payments under the arrangement. Compensation expense recorded under this arrangement was $113,387 for the first three quarters of the current fiscal year. Deferred compensation expense of $62,783 was recognized in the nine months ended March 31, 2023.

Recently Adopted Accounting Pronouncements

I) RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS

Effective July 1, 2023, the Company adopted Accounting Standards Update (ASU) 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard replaced the incurred loss methodology with an expected loss methodology that is referred to as the current expected credit loss (“CECL”) methodology. CECL requires an estimate of credit losses for the remaining estimated life of the financial asset using historical experience, current conditions, and reasonable and supportable forecasts and generally applies to financial assets measured at amortized cost, including trade receivables and held-to-maturity debt securities. Financial assets measured at amortized cost are presented at the net amount expected to be collected by using an allowance for credit losses. The standard’s main goal is to improve financial reporting by requiring earlier recognition of credit losses on financing receivables and other financial assets, including accounts receivable.

The Company adopted ASU 2016-13 effective July 1, 2023 using the modified retrospective approach for all financial assets measured at amortized cost.

Allowance for Credit Losses – Accounts Receivable: The allowance for credit losses is deducted from the cost basis of the receivable to present the net amount expected to be collected on the accounts. The Company measures expected credit losses for accounts receivable using the aging method whereby expected credit losses are determined on the basis of how long a receivable has been outstanding. Historical loss data is utilized to estimate expected losses as the risk characteristics of the customer base and the Company’s credit practices have not changed significantly over time. The estimates are then adjusted for current conditions, such as level of inflation and the potential change in credit availability given rising interest rates, as well as supportable and reasonable forecasts indicating whether these conditions will continue into the future or new ones will arise that need to be considered.

Upon evaluation of the impact of this ASU, the Company concluded that minimal reserves were necessary as historical losses were immaterial, and, based on the qualitative and quantitative analysis performed in accordance with Topic 326 requirements, the Company determined there was no reasonable expectation of significant credit losses associated with the Company’s accounts receivable in the foreseeable future.

Allowance for Credit Losses - Held-to Maturity Debt Securities: The Company did not record an allowance for credit losses on held-to-maturity U.S. Treasury securities as these securities have the following characteristics that support a zero loss expectation: they are explicitly guaranteed by the U.S. government, are consistently highly rated by major rating agencies and have a long history of no credit losses.

The adoption of ASU 2016-13 did not have a material impact on the Company’s condensed consolidated financial statements. Results for reporting periods beginning after July 1, 2023 are presented under CECL while prior period amounts continue to be reported in accordance with previously applicable accounting standards (“Incurred Loss”).

Other recent accounting pronouncements issued by the FASB, including its Emerging Issues Task Force, the American Institute of Certified Public Accountants, and the Securities and Exchange Commission did not have, or are not expected by management to have a material impact on the Company’s present or future consolidated financial statements

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References + Details

- Definition

Disclosure of accounting policy for investment in financial asset.

+ References + Details

Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Condensed Consolidated Statements of Operations [Abstract]
Net sales	$ 2,637,606	$ 3,380,840	$ 9,371,668	$ 10,026,301
Cost of goods sold	1,796,083	2,076,482	6,354,015	6,390,557
Gross profit	841,523	1,304,358	3,017,653	3,635,744
Selling, general and administrative expenses	1,451,247	1,749,341	4,572,049	27,907,246
(Loss) from operations	(609,724)	(444,983)	(1,554,396)	(24,271,502)
Other income				33,000,000
Interest income	214,814	189,593	636,482	314,482
(Loss) income before income tax provision (benefit)	(394,910)	(255,390)	(917,914)	9,042,980
Income tax provision (benefit)	(81,130)	(30,910)	(77,372)	463,928
Net (loss) income	$ (313,780)	$ (224,480)	$ (840,542)	$ 8,579,052
(Loss) income per common share:
Basic (in dollars per share)	$ (0.03)	$ (0.02)	$ (0.09)	$ 0.93
Diluted (in dollars per share)	$ (0.03)	$ (0.02)	$ (0.09)	$ 0.88
Weighted-average number of shares:
Basic (in shares)	9,254,795	9,206,135	9,243,559	9,183,042
Diluted (in shares)	9,254,795	9,206,135	9,243,559	9,791,627

Legal Matters (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
Legal Matters (Narrative) (Details) - USD ($)	Mar. 31, 2023	Mar. 31, 2023	Mar. 31, 2024	Jun. 30, 2023
Legal Matters [Abstract]
Licensing proceeds	$ 0	$ 33,000,000
Legal fees and related expenses		$ 22,141,408
Estimate of loss			$ 41,000	$ 41,000

Employee Stock Ownership Plan

9 Months Ended

Mar. 31, 2024

Employee Stock Ownership Plan [Abstract]

Employee Stock Ownership Plan

9. EMPLOYEE STOCK OWNERSHIP PLAN

The Company amended and restated its Koss Employee Stock Ownership Trust (“KESOT”) effective July 1, 2023 and received approval from the Board of Directors on July 26, 2023. Substantially all domestic employees are participants in the KESOT under which an annual contribution in either cash or common stock may be made at the discretion of the Board of Directors. All contributions to date have been fully allocated to employees’ company contribution accounts. No contributions were made for the three or nine months ended March 31, 2024 or 2023, respectively.

Related Party Transactions (Narrative) (Details) - USD ($)	3 Months Ended	9 Months Ended
	Mar. 31, 2024	Mar. 31, 2024	Mar. 31, 2023
Related Party Transaction [Line Items]
Lease renewal term	5 years	5 years
Lease Extension Per Year		$ 380,000
Related party transaction amount	$ 0	$ 0	$ 79,000
Additional Renewal [Member]
Related Party Transaction [Line Items]
Lease renewal term	5 years	5 years
Lease Extension Per Year		$ 397,000

Summary of Significant Accounting Policies

9 Months Ended

Mar. 31, 2024

Summary of Significant Accounting Policies [Abstract]

Summary of Significant Accounting Policies

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

A) BASIS OF PRESENTATION

B) REVISION OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS

During the second quarter of fiscal year 2024, the Company learned that due to misinterpretation of the required tax treatment for certain disqualifying dispositions of Incentive Stock Options (ISO), the Company improperly withheld amounts for Social Security and Medicare (“FICA”) taxes on the taxable gains resulting from those dispositions and remitted such amounts to the Internal Revenue Service (“IRS”). Thus, for such disqualifying dispositions of ISOs beginning in fiscal year 2021, certain employees are owed a refund from the Company for the overpayment of the FICA taxes, with a similar refund due to the Company from the IRS for the employer portion of the taxes which were also remitted to the IRS and expensed by the Company. The Company intends to reimburse the over withheld taxes to the impacted employees and to file amended 941-X forms with the IRS to claim a refund for both the Company overpayment of FICA taxes as well as the amounts refunded to employees. As of March 31, 2024 the over withheld taxes due to the impacted employees was $354,971 and is recorded in accrued liabilities on the condensed consolidated balance sheet as of that date. The refund expected from the IRS is $722,498 and is included in prepaid expenses and other current assets on the condensed consolidated balance sheet at March 31, 2024.

Based on an analysis of Accounting Standards Codification ASC 250 – “Accounting Changes and Error Corrections” (“ASC 250”), Staff Accounting Bulletin 99 – “Materiality” and Staff Accounting Bulletin 108 – “Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements”, the Company determined that these errors did not result in the previously issued consolidated financial statements being materially misstated, and as such no restatement was necessary.
‎


	As of June 30, 2023
	As Previously Reported	Revision	As Revised
Condensed consolidated balance sheet:
Prepaid expenses and other current assets	284,622	717,892	1,002,514
Total current assets	28,380,967	717,892	29,098,859
Total assets	38,370,805	717,892	39,088,697
Accrued liabilities	970,530	371,509	1,342,039
Total current liabilities	2,011,817	371,509	2,383,326
Total liabilities	6,909,910	371,509	7,281,419
Retained earnings	18,300,728	346,383	18,647,111
Total stockholders' equity	31,460,895	346,383	31,807,278


	Three Months Ended March 31, 2023			Nine Months Ended March 31, 2023
	As Previously Reported	Revision	As Revised	As Previously Reported	Revision	As Revised
Condensed consolidated statements of operations:
Selling, general and administrative expenses	1,757,714	(8,373)	1,749,341	27,921,287	(14,041)	27,907,246
(Loss) from operations	(453,356)	8,373	(444,983)	(24,285,543)	14,041	(24,271,502)
(Loss) income before income tax provision	(263,763)	8,373	(255,390)	9,028,939	14,041	9,042,980
Net (loss) income	(232,853)	8,373	(224,480)	8,565,011	14,041	8,579,052
(Loss) income per common share:
Basic	(0.03)		(0.02)	0.93		0.93
Diluted	(0.03)		(0.02)	0.87		0.88


	Nine Months Ended March 31, 2023
	As Previously Reported	Revision	As Revised
Condensed consolidated statement of cash flows:
Net income	8,565,011	14,041	8,579,052
Prepaid expenses and other current assets	(205,710)	(28,082)	(233,792)
Accrued liabilities	310,466	14,041	324,507
Net cash provided by operating activities	10,616,726	(0)	10,616,726


	As Previously Reported	Revision	As Revised
Retained earnings, June 30, 2022	9,998,348	329,551	10,327,899
Total stockholders' equity, June 30, 2022	22,697,489	329,551	23,027,040

Retained earnings, December 31, 2022	18,796,212	335,219	19,131,431
Total stockholders' equity, December 31, 2022	31,751,001	335,219	32,086,220

Retained earnings, June 30, 2023	18,300,728	346,383	18,647,111
Total stockholders' equity, June 30, 2023	31,460,895	346,383	31,807,278

The Company's condensed consolidated statements of stockholders' equity for the three and nine months ended March 31, 2023 have also been revised to reflect the impacts to net (loss) income as presented above.

C) INVESTMENTS

D) FAIR VALUE MEASUREMENTS

E) INCOME TAXES

‎

Temporary differences which give rise to deferred income tax assets and liabilities at March 31, 2024 and June 30, 2023 include:


	March 31, 2024		June 30, 2023
Deferred income tax assets:
Deferred compensation	$	516,932	$	491,608
Stock-based compensation		77,530		117,607
Accrued expenses and reserves		524,892		571,719
Deferred revenue		100,973		138,665
Federal and state net operating loss carryforwards		8,456,728		8,216,671
IRC Section 174 research and development costs		113,521		63,855
Credit carryforwards		188,893		169,552
Equipment and leasehold improvements		130,637		136,294
Lease liability		684,670		744,431
Valuation allowance		(10,093,269)		(9,906,018)
Total deferred income tax assets		701,507		744,384

Deferred income tax liabilities:
ROU asset		(680,737)		(742,386)
Other		(20,770)		(1,998)
Total deferred income tax liabilities		(701,507)		(744,384)
Net deferred income tax assets	$	-	$	-

F) LEGAL COSTS

G) OTHER INCOME

Other income is shown as a separate line on the condensed consolidated statements of operations.

H) DEFERRED COMPENSATION

I) RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS

The Company adopted ASU 2016-13 effective July 1, 2023 using the modified retrospective approach for all financial assets measured at amortized cost.

Revenue Recognition (Tables)

9 Months Ended

Mar. 31, 2024

Revenue Recognition [Abstract]

Disaggregation of Revenue


	Three Months Ended				Nine Months Ended
	March 31,				March 31,
	2024		2023		2024		2023
United States	$	2,055,551	$	2,728,824	$	7,326,220	$	7,620,067
Export		582,055		652,016		2,045,448		2,406,234
Net Sales	$	2,637,606	$	3,380,840	$	9,371,668	$	10,026,301

Investments (Summary of Unrealized Positions for Held-to-Maturity Debt Securities) (Details) - USD ($)	Mar. 31, 2024	Jun. 30, 2023
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost basis	$ 17,032,899	$ 17,064,274
Gross unrealized losses	(49,886)	(93,740)
Fair Value	16,983,013	16,970,534
US Treasury Securities [Member]
Schedule of Held-to-Maturity Securities [Line Items]
Amortized cost basis	17,032,899	17,064,274
Gross unrealized losses	(49,886)	(93,740)
Fair Value	$ 16,983,013	$ 16,970,534

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

Investments (Tables)

9 Months Ended

Mar. 31, 2024

Investments [Abstract]

Summary of Unrealized Positions for Held-to-Maturity Debt Securities


	March 31, 2024
	Amortized cost basis		Gross unrealized gains		Gross unrealized losses		Fair Value
US Treasury securities	$	17,032,899	$	—	$	(49,886)	$	16,983,013
Total	$	17,032,899	$	—	$	(49,886)	$	16,983,013


	June 30, 2023
	Amortized cost basis		Gross unrealized gains		Gross unrealized losses		Fair Value
US Treasury securities	$	17,064,274	$	—	$	(93,740)	$	16,970,534
Total	$	17,064,274	$	—	$	(93,740)	$	16,970,534

Summary of Held-to-Maturity Debt Securities by Contractual Maturity


	March 31, 2024
	Amortized Cost Basis		Fair value
Due within one year	$	7,020,288	$	7,007,734
Due after one year through five years		10,012,611		9,975,279
Total	$	17,032,899	$	16,983,013


	June 30, 2023
	Amortized Cost Basis		Fair value
Due within one year	$	17,064,274	$	16,970,534
Total	$	17,064,274	$	16,970,534

- Definition

Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity).

+ References

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+ Details

Inventories

9 Months Ended

Mar. 31, 2024

Inventories [Abstract]

Inventories

3. INVENTORIES

The components of inventories were as follows:



	March 31, 2024		June 30, 2023
Raw materials	$	2,011,332	$	2,071,360
Finished goods		4,519,572		6,178,186
Inventories, gross		6,530,904		8,249,546
Reserve for obsolete inventory		(1,869,899)		(1,826,105)
Inventories, net	$	4,661,005	$	6,423,441

Stock-Based Compensation

9 Months Ended

Mar. 31, 2024

Stock-Based Compensation [Abstract]

Stock-Based Compensation

10. STOCK-BASED COMPENSATION

In 2023, pursuant to the recommendation of the Board of Directors, the shareholders approved the creation of the Koss Corporation 2023 Equity Incentive Plan (the “2023 Plan”). Concurrently with the adoption of the new plan, the Koss Corporation 2012 Omnibus Incentive Plan (the “2012 Plan”) was terminated.

The Compensation Committee of the Board of Directors administers the 2023 Plan and provides for the granting of various stock-based incentive awards to eligible participants, primarily officers and certain key employees of the Company. 2,000,000 shares of common stock were authorized for issuance under the 2023 Plan, plus any shares subject to awards remaining outstanding under the 2012 Plan that expired or are otherwise forfeited, canceled, or terminated. The Company’s Board of Directors will determine the terms and conditions under which an option will become exercisable but expects that stock options granted under the 2023 Plan will vest over a three-to-five-year period from the date of grant. An option will expire no more than ten years from its grant date, with the exception of incentive stock options held by a 10% stockholder, which will expire no more than five years from the grant date. As with the 2012 Plan, pursuant to the 2023 Plan new shares will be issued upon exercise of stock options. As of March 31, 2024, no new stock-based awards have been granted under the 2023 Plan.

(Loss) Income per Common and Common Stock Equivalent Share (Tables)

9 Months Ended

Mar. 31, 2024

(Loss) Income per Common and Common Stock Equivalent Share [Abstract]

Reconciliation of Numerator and Denominator Used to Calculate Basic and Diluted (Loss) Income per Share



	Three Months Ended March 31,				Nine Months Ended March 31,
	2024		2023		2024		2023
Numerator
Net (loss) income	$	(313,780)	$	(224,480)	$	(840,542)	$	8,579,052

Denominator
Weighted average shares, basic		9,254,795		9,206,135		9,243,559		9,183,042
Dilutive effect of stock compensation awards (1)		—		—		—		608,585
Diluted shares		9,254,795		9,206,135		9,243,559		9,791,627

Net (loss) income attributable to common shareholders per share:
Basic	$	(0.03)	$	(0.02)	$	(0.09)	$	0.93
Diluted	$	(0.03)	$	(0.02)	$	(0.09)	$	0.88

(1) Excludes 700,911, 729,384, and 999,557 weighted average stock options during the three and nine months ended March 31, 2024 and the three months ended March 31, 2023, respectively, as the impact of such awards was anti-dilutive. For the nine months ended March 31, 2023, no stock options were anti-dilutive.

(Loss) Income per Common and Common Stock Equivalent Share

9 Months Ended

Mar. 31, 2024

(Loss) Income per Common and Common Stock Equivalent Share [Abstract]

(Loss) Income per Common and Common Stock Equivalent Share

6. (LOSS) INCOME PER COMMON AND COMMON STOCK EQUIVALENT SHARE

Basic (loss) income per common share is computed based on the weighted-average number of common shares outstanding. Diluted (loss) income per common share is calculated assuming the exercise of stock options except where the result would be anti-dilutive. The following table reconciles the numerator and denominator used to calculate basic and diluted (loss) income per share:



	Three Months Ended March 31,				Nine Months Ended March 31,
	2024		2023		2024		2023
Numerator
Net (loss) income	$	(313,780)	$	(224,480)	$	(840,542)	$	8,579,052

Denominator
Weighted average shares, basic		9,254,795		9,206,135		9,243,559		9,183,042
Dilutive effect of stock compensation awards (1)		—		—		—		608,585
Diluted shares		9,254,795		9,206,135		9,243,559		9,791,627

Net (loss) income attributable to common shareholders per share:
Basic	$	(0.03)	$	(0.02)	$	(0.09)	$	0.93
Diluted	$	(0.03)	$	(0.02)	$	(0.09)	$	0.88

Accounts Receivable Concentrations (Narrative) (Details) - Accounts Receivable [Member] - customer	9 Months Ended	12 Months Ended
	Mar. 31, 2024	Jun. 30, 2023
Concentration Risk [Line Items]
Number of major customers	3	3
Customer Concentration Risk [Member] \| Customer One [Member]
Concentration Risk [Line Items]
Concentration risk percentage	25.00%	24.00%
Customer Concentration Risk [Member] \| Customer Two [Member]
Concentration Risk [Line Items]
Concentration risk percentage	12.00%	14.00%
Customer Concentration Risk [Member] \| Customer Three [Member]
Concentration Risk [Line Items]
Concentration risk percentage	10.00%	13.00%

Summary of Significant Accounting Policies (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($)	Mar. 31, 2024	Jun. 30, 2023
Summary of Significant Accounting Policies [Abstract]
Deferred compensation	$ 516,932	$ 491,608
Stock-based compensation	77,530	117,607
Accrued expenses and reserves	524,892	571,719
Deferred revenue	100,973	138,665
Federal and state net operating loss carryforwards	8,456,728	8,216,671
IRC Section 174 research and development costs	113,521	63,855
Credit carryforwards	188,893	169,552
Equipment and leasehold improvements	130,637	136,294
Lease liability	684,670	744,431
Valuation allowance	(10,093,269)	(9,906,018)
Total deferred income tax assets	701,507	744,384
ROU asset	(680,737)	(742,386)
Other	(20,770)	(1,998)
Total deferred income tax liabilities	(701,507)	(744,384)
Net deferred income tax assets

Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023
Accounting Policies Disclosure [Line Items]
Accrued liabilities	$ 901,297		$ 901,297		$ 1,342,039
Prepaid expenses and other current assets	1,117,276		1,117,276		1,002,514
Income tax provision (benefit)	(81,130)	$ (30,910)	(77,372)	$ 463,928
Effective tax rate				5.10%
Other income	0		0	$ 33,000,000
Licensing proceeds		0		33,000,000
Tax loss carryforward	32,800,000		32,800,000
Allowance for credit losses, held-to-maturity debt securities	0		$ 0
Maximum [Member]
Accounting Policies Disclosure [Line Items]
Effective tax rate			1.00%
Over Withheld Taxes [Member]
Accounting Policies Disclosure [Line Items]
Accrued liabilities	354,971		$ 354,971
Prepaid expenses and other current assets	722,498		722,498
Federal [Member]
Accounting Policies Disclosure [Line Items]
Income tax provision (benefit)	(82,653)	0	(82,653)	374,714
State and Local Jurisdiction [Member]
Accounting Policies Disclosure [Line Items]
Income tax provision (benefit)	1,522	$ (30,910)	5,281	89,214
Current Officer [Member]
Accounting Policies Disclosure [Line Items]
Deferred compensation liability	$ 2,110,507		2,110,507		$ 1,997,120
Deferred compensation expense (income)			$ 113,387	$ 62,783

Inventories (Tables)

9 Months Ended

Mar. 31, 2024

Inventories [Abstract]

Components of Inventories



	March 31, 2024		June 30, 2023
Raw materials	$	2,011,332	$	2,071,360
Finished goods		4,519,572		6,178,186
Inventories, gross		6,530,904		8,249,546
Reserve for obsolete inventory		(1,869,899)		(1,826,105)
Inventories, net	$	4,661,005	$	6,423,441

Related Party Transactions

9 Months Ended

Mar. 31, 2024

Related Party Transactions

7. RELATED PARTY TRANSACTIONS

The Company leases its facility in Milwaukee, Wisconsin from Koss Holdings, LLC, which is controlled by five equal ownership interests in trusts held by the five beneficiaries of a former chairman’s revocable trust and includes current stockholders of the Company. On May 24, 2022, the lease was renewed for a period of five years, ending June 30, 2028, and is being accounted for as an operating lease. The lease extension maintained the rent at a fixed rate of $380,000 per year and included an option to renew at an increased rate of $397,000 for an additional five years ending June 30, 2033. The negotiated increase in rent slated for 2028 will be the first increase in rent since 1996. The Company is responsible for all property maintenance, insurance, taxes and other normal expenses related to ownership.

During the nine months ended March 31, 2023, the Company accrued and made charitable contributions of $79,000 to the Koss Foundation (the “Foundation”), a 501(c)(3) charitable organization for which Michael J. Koss and John C. Koss Jr., executive officers of the Company, serve as officers. Neither officer receives fees or compensation from the Foundation for holding these positions. There were no charitable contributions made to the Foundation during the three and nine months ended March 31, 2024.

- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Credit Facility (Narrative) (Details) - Town Bank [Member] - Credit Agreement [Member] - USD ($)	9 Months Ended
	Mar. 31, 2024	Jun. 30, 2023
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 5,000,000
Maximum borrowing capacity per letter of credit	$ 1,000,000
Unused line fees	0.00%
Spread on variable interest rate	1.50%
Outstanding borrowings	$ 0	$ 0

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Investments

9 Months Ended

Mar. 31, 2024

Investments [Abstract]

Investments

2. INVESTMENTS

The following tables summarize the unrealized positions for the held-to-maturity debt securities as of March 31, 2024 and June 30, 2023:


	March 31, 2024
	Amortized cost basis		Gross unrealized gains		Gross unrealized losses		Fair Value
US Treasury securities	$	17,032,899	$	—	$	(49,886)	$	16,983,013
Total	$	17,032,899	$	—	$	(49,886)	$	16,983,013


	June 30, 2023
	Amortized cost basis		Gross unrealized gains		Gross unrealized losses		Fair Value
US Treasury securities	$	17,064,274	$	—	$	(93,740)	$	16,970,534
Total	$	17,064,274	$	—	$	(93,740)	$	16,970,534

‎

The following tables summarize the fair value and amortized cost basis of the held-to-maturity debt securities by contractual maturity as of March 31, 2024 and June 30, 2023:


	March 31, 2024
	Amortized Cost Basis		Fair value
Due within one year	$	7,020,288	$	7,007,734
Due after one year through five years		10,012,611		9,975,279
Total	$	17,032,899	$	16,983,013


	June 30, 2023
	Amortized Cost Basis		Fair value
Due within one year	$	17,064,274	$	16,970,534
Total	$	17,064,274	$	16,970,534

Revenue Recognition

9 Months Ended

Mar. 31, 2024

Revenue Recognition [Abstract]

Revenue Recognition

‎

5. REVENUE RECOGNITION

The Company disaggregates its net sales by geographical location as it believes it best depicts how the nature, timing and uncertainty of net sales and cash flows are affected by economic factors. The following table summarizes net sales by geographical location:


	Three Months Ended				Nine Months Ended
	March 31,				March 31,
	2024		2023		2024		2023
United States	$	2,055,551	$	2,728,824	$	7,326,220	$	7,620,067
Export		582,055		652,016		2,045,448		2,406,234
Net Sales	$	2,637,606	$	3,380,840	$	9,371,668	$	10,026,301

Deferred revenue relates primarily to consumer and customer warranties. These constitute future performance obligations, and the Company defers revenue related to these future performance obligations. Effective July 1, 2023, the Company increased its deferral rates from 2.4% to 3% for domestic sales and decreased its deferral rate from 10% to 8% for export sales to reflect recent warranty experience. In the nine months ended March 31, 2024 and 2023, the Company recognized revenue, which was included in the deferred revenue liability at the beginning of the periods of $264,251 and $284,584, respectively, for performance obligations related to consumer and customer warranties. The Company estimates that the deferred revenue performance obligations are satisfied within one year to three years and therefore uses that same timeframe for recognition of the deferred revenue.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-Section 50
-Paragraph 9
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-URI https://asc.fasb.org//1943274/2147479806/606-10-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Condensed Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Paid in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Jun. 30, 2022	9,147,795
Balance at Jun. 30, 2022	$ 45,739	$ 12,653,402	$ 10,327,899	$ 23,027,040
Net income (loss)			8,579,052	8,579,052
Stock-based compensation expense		243,688		243,688
Stock option exercises (in shares)	69,000
Stock option exercises	$ 345	136,985		137,330
Balance (in shares) at Mar. 31, 2023	9,216,795
Balance at Mar. 31, 2023	$ 46,084	13,034,075	18,906,951	31,987,110
Balance (in shares) at Dec. 31, 2022	9,189,795
Balance at Dec. 31, 2022	$ 45,949	12,908,840	19,131,431	32,086,220
Net income (loss)			(224,480)	(224,480)
Stock-based compensation expense		76,980		76,980
Stock option exercises (in shares)	27,000
Stock option exercises	$ 135	48,255		48,390
Balance (in shares) at Mar. 31, 2023	9,216,795
Balance at Mar. 31, 2023	$ 46,084	13,034,075	18,906,951	$ 31,987,110
Balance (in shares) at Jun. 30, 2023	9,234,795			9,234,795
Balance at Jun. 30, 2023	$ 46,174	13,113,993	18,647,111	$ 31,807,278
Net income (loss)			(840,542)	(840,542)
Stock-based compensation expense		119,937		119,937
Stock option exercises (in shares)	20,000
Stock option exercises	$ 100	35,700		$ 35,800
Balance (in shares) at Mar. 31, 2024	9,254,795			9,254,795
Balance at Mar. 31, 2024	$ 46,274	13,269,630	17,806,569	$ 31,122,473
Balance (in shares) at Dec. 31, 2023	9,254,795
Balance at Dec. 31, 2023	$ 46,274	13,233,733	18,120,349	31,400,356
Net income (loss)			(313,780)	(313,780)
Stock-based compensation expense		35,897		$ 35,897
Balance (in shares) at Mar. 31, 2024	9,254,795			9,254,795
Balance at Mar. 31, 2024	$ 46,274	$ 13,269,630	$ 17,806,569	$ 31,122,473

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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+ Details

- Definition

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

+ References

+ Details

Summary of Significant Accounting Policies (Effect of Revision of Consolidated Statements Of Operations) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Accounting Policies Disclosure [Line Items]
Selling, general and administrative expenses	$ 1,451,247	$ 1,749,341	$ 4,572,049	$ 27,907,246
(Loss) from operations	(609,724)	(444,983)	(1,554,396)	(24,271,502)
(Loss) income before income tax provision	(394,910)	(255,390)	(917,914)	9,042,980
Net (loss) income	$ (313,780)	$ (224,480)	$ (840,542)	$ 8,579,052
(Loss) income per common share:
Basic (in dollars per share)	$ (0.03)	$ (0.02)	$ (0.09)	$ 0.93
Diluted (in dollars per share)	$ (0.03)	$ (0.02)	$ (0.09)	$ 0.88
As Previously Reported [Member]
Accounting Policies Disclosure [Line Items]
Selling, general and administrative expenses		$ 1,757,714		$ 27,921,287
(Loss) from operations		(453,356)		(24,285,543)
(Loss) income before income tax provision		(263,763)		9,028,939
Net (loss) income		$ (232,853)		$ 8,565,011
(Loss) income per common share:
Basic (in dollars per share)		$ (0.03)		$ 0.93
Diluted (in dollars per share)		$ (0.03)		$ 0.87
Revision [Member]
Accounting Policies Disclosure [Line Items]
Selling, general and administrative expenses		$ (8,373)		$ (14,041)
(Loss) from operations		8,373		14,041
(Loss) income before income tax provision		8,373		14,041
Net (loss) income		$ 8,373		$ 14,041

Summary of Significant Accounting Policies (Effect of Revision of Condensed Consolidated Statement Of Cash Flows) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Operating activities:
Net (loss) income	$ (313,780)	$ (224,480)	$ (840,542)	$ 8,579,052
Net changes in operating assets and liabilities:
Prepaid expenses and other current assets			(114,762)	(233,792)
Accrued liabilities			(440,742)	324,507
Net cash provided by operating activities			$ (16,558)	10,616,726
As Previously Reported [Member]
Operating activities:
Net (loss) income		(232,853)		8,565,011
Net changes in operating assets and liabilities:
Prepaid expenses and other current assets				(205,710)
Accrued liabilities				310,466
Net cash provided by operating activities				10,616,726
Revision [Member]
Operating activities:
Net (loss) income		$ 8,373		14,041
Net changes in operating assets and liabilities:
Prepaid expenses and other current assets				(28,082)
Accrued liabilities				14,041
Net cash provided by operating activities				$ 0

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

(Loss) Income per Common and Common Stock Equivalent Share (Reconciliation of Numerator and Denominator Used to Calculate Basic and Diluted (Loss) Income per Share) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
(Loss) Income per Common and Common Stock Equivalent Share [Abstract]
Net (loss) income	$ (313,780)	$ (224,480)	$ (840,542)	$ 8,579,052
Weighted average shares, basic (in shares)	9,254,795	9,206,135	9,243,559	9,183,042
Dilutive effect of stock compensation awards (in shares)				608,585
Diluted shares (in shares)	9,254,795	9,206,135	9,243,559	9,791,627
Basic (in dollars per share)	$ (0.03)	$ (0.02)	$ (0.09)	$ 0.93
Diluted (in dollars per share)	$ (0.03)	$ (0.02)	$ (0.09)	$ 0.88
Anti-dilutive shares	700,911	999,557	729,384	0

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Employee Stock Ownership Plan (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Koss Employee Stock Ownership Trust [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Contributions	$ 0	$ 0	$ 0	$ 0

Condensed Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities:
Net (loss) income	$ (840,542)	$ 8,579,052
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:
(Recovery of) Provision for credit losses	(4,105)	40,277
Depreciation of equipment and leasehold improvements	142,046	186,168
Accretion of discount on treasury securities	(313,704)	(110,632)
Noncash operating lease expense	5,752	6,391
Stock-based compensation expense	119,937	243,688
Change in cash surrender value of life insurance	(156,644)	(147,012)
Provision for deferred compensation	113,387	62,783
Loss on disposal of fixed assets		2,263
Net changes in operating assets and liabilities:
Accounts receivable	186,567	570,932
Inventories	1,762,436	1,552,103
Prepaid expenses and other current assets	(114,762)	(233,792)
Interest receivable	(65,425)	(56,014)
Income taxes receivable	(123,877)
Income taxes payable	(81,956)	247,170
Accounts payable	(51,808)	(442,850)
Accrued liabilities	(440,742)	324,507
Deferred revenue	(153,118)	(208,308)
Net cash (used in) provided by operating activities	(16,558)	10,616,726
Investing activities:
Purchase of equipment and leasehold improvements	(460,960)	(68,242)
Life insurance premiums paid	(81,744)	(87,994)
Proceeds from the maturity of treasury securities	14,331,000
Purchases of treasury securities	(13,985,921)	(16,884,358)
Net cash used in investing activities	(197,625)	(17,040,594)
Financing activities:
Proceeds from exercise of stock options	35,800	137,330
Net cash provided by financing activities	35,800	137,330
Net (decrease) in cash and cash equivalents	(178,383)	(6,286,538)
Cash and cash equivalents at beginning of period	3,091,062	9,208,170
Cash and cash equivalents at end of period	2,912,679	2,921,632
Supplemental cash flow information:
Cash paid for income taxes	$ 128,463	$ 216,759

Investments (Summary of Held-to-Maturity Debt Securities by Contractual Maturity) (Details) - USD ($)	Mar. 31, 2024	Jun. 30, 2023
Amortized cost basis
Due within one year	$ 7,020,288	$ 17,064,274
Due after one year through five years	10,012,611
Amortized cost basis	17,032,899	17,064,274
Fair Value
Due within one year	7,007,734	16,970,534
Due after one year through five years	9,975,279
Fair Value	$ 16,983,013	$ 16,970,534

Legal Matters

9 Months Ended

Mar. 31, 2024

Legal Matters [Abstract]

Legal Matters

11. LEGAL MATTERS

As of March 31, 2024, the Company is involved in the matters described below:

•The Company maintains a program focused on enforcing its intellectual property and, in particular, certain patents in its patent portfolio. As part of this program, the Company filed complaints against certain parties alleging infringement on the Company’s patents relating to its wireless audio technology. In the event that a monetary award or judgment is received by the Company in connection with these complaints, all or portions of such amounts, such as contingent legal fees, will be due to third parties. The Company may incur additional fees and costs related to these lawsuits, however, timing and impact on its condensed financial statements is uncertain. Depending on the response to and the underlying results of the enforcement program, the Company may continue to litigate its claims, enter into licensing arrangements or reach some other outcome potentially advantageous to its competitive position. During the nine months ended March 31, 2023, in connection with its intellectual property enforcement program, the Company granted a license covering certain of its patents and recognized gross proceeds of $33,000,000, which was recorded as other income. Total legal fees and related expenses of $22,141,408 in the nine months ended March 31, 2023, respectively, offset these proceeds and were recorded as selling, general and administrative expense.

•The Company was notified by One-E-Way, Inc. that some of the Company's wireless products may infringe on certain One-E-Way patents. No lawsuits involving these allegations have yet been filed and served on the Company. The Company is currently investigating whether these allegations have any merit. Depending on the results of the investigation and the defense of these allegations, the ultimate resolution of this matter may have a material effect on the Company's condensed consolidated financial statements. The Company estimates that this matter will ultimately be resolved at a cost of approximately $41,000 and has accrued this amount as of March 31, 2024 and June 30, 2023.

The ultimate resolution of these matters is not determinable unless otherwise noted.

The Company is also subject to a variety of other claims and suits that arise from time to time in the ordinary course of its business. Although management currently believes that resolving these claims against the Company, individually or in the aggregate, will not have a material adverse impact on its condensed consolidated financial statements, these matters are subject to inherent uncertainties and management’s view of these matters may change in the future.

Credit Facility

9 Months Ended

Mar. 31, 2024

Credit Facility [Abstract]

Credit Facility

4. CREDIT FACILITY

On May 14, 2019, the Company entered into a secured credit facility (“Credit Agreement”) with Town Bank (“Lender”). The Credit Agreement provides for a $5,000,000 revolving secured credit facility for letters of credit for the benefit of the Company of up to a sublimit of $1,000,000. There are no unused line fees in the credit facility. On January 28, 2021, the Credit Agreement was amended to extend the expiration to October 31, 2022, and to change the interest rate to Wall Street Journal Prime less 1.50%. A Third Amendment to the Credit Agreement effective October 30, 2022 extends the maturity date to October 31, 2024. The Company and the Lender also entered into a General Business Security Agreement dated May 14, 2019 under which the Company granted the Lender a security interest in substantially all of the Company’s assets in connection with the Company’s obligations under the Credit Agreement. The Credit Agreement contains certain affirmative and negative covenants customary for financings of this type. The negative covenants include restrictions on other indebtedness, liens, fundamental changes, certain investments, disposition of assets, mergers and liquidations, among other restrictions. As of March 31, 2024, the Company was in compliance with all covenants related to the Credit Agreement. As of March 31, 2024 and June 30, 2023, there were no outstanding borrowings on the facility.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (h)
-Publisher FASB
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+ Details

Summary of Significant Accounting Policies (Effect of Revision of Condensed Consolidated Balance Sheet) (Details) - USD ($)	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022
Current assets:
Prepaid expenses and other current assets	$ 1,117,276		$ 1,002,514
Total current assets	17,235,656		29,098,859
Total assets	37,604,868		39,088,697
Current liabilities:
Accrued liabilities	901,297		1,342,039
Total current liabilities	1,651,648		2,383,326
Long-term liabilities:
Total liabilities	6,482,395		7,281,419
Stockholders' equity:
Retained earnings	17,806,569		18,647,111		$ 19,131,431	$ 10,327,899
Total stockholders' equity	$ 31,122,473	$ 31,400,356	31,807,278	$ 31,987,110	32,086,220	23,027,040
As Previously Reported [Member]
Current assets:
Prepaid expenses and other current assets			284,622
Total current assets			28,380,967
Total assets			38,370,805
Current liabilities:
Accrued liabilities			970,530
Total current liabilities			2,011,817
Long-term liabilities:
Total liabilities			6,909,910
Stockholders' equity:
Retained earnings			18,300,728		18,796,212	9,998,348
Total stockholders' equity			31,460,895		31,751,001	22,697,489
Revision [Member]
Current assets:
Prepaid expenses and other current assets			717,892
Total current assets			717,892
Total assets			717,892
Current liabilities:
Accrued liabilities			371,509
Total current liabilities			371,509
Long-term liabilities:
Total liabilities			371,509
Stockholders' equity:
Retained earnings			346,383		335,219	329,551
Total stockholders' equity			$ 346,383		$ 335,219	$ 329,551

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Mar. 31, 2024	May 06, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Fiscal Year Focus	2024
Current Fiscal Year End Date	--06-30
Document Transition Report	false
Entity File Number	0-3295
Entity Registrant Name	KOSS CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	4129 North Port Washington Avenue
Entity Address, City Or Town	Milwaukee
Entity Address, State Or Province	WI
Entity Tax Identification Number	39-1168275
Entity Address, Postal Zip Code	53212
City Area Code	414
Local Phone Number	964-5000
Title of 12(b) Security	Common Stock, par value $0.005 per share
Trading Symbol	KOSS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		9,254,795
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000056701
Amendment Flag	false

Revenue Recognition (Disaggregation of Revenue) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Net Sales	$ 2,637,606	$ 3,380,840	$ 9,371,668	$ 10,026,301
United States [Member]
Disaggregation of Revenue [Line Items]
Net Sales	2,055,551	2,728,824	7,326,220	7,620,067
Export [Member]
Disaggregation of Revenue [Line Items]
Net Sales	$ 582,055	$ 652,016	$ 2,045,448	$ 2,406,234

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-30

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 22
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147479806/606-10-50-4

+ Details

Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2024	Jun. 30, 2023
Current assets:
Cash and cash equivalents	$ 2,912,679	$ 3,091,062
Short term investments	7,020,288	17,064,274
Accounts receivable, less allowance for credit losses of $1,922 and $6,027, respectively	1,197,055	1,379,517
Inventories	4,661,005	6,423,441
Prepaid expenses and other current assets	1,117,276	1,002,514
Interest receivable	116,575	51,150
Income taxes receivable	210,778	86,901
Total current assets	17,235,656	29,098,859
Equipment and leasehold improvements, net	1,272,817	953,903
Other assets:
Long term investments	10,012,611
Operating lease right-of-use asset	2,825,348	3,015,887
Cash surrender value of life insurance	6,258,436	6,020,048
Total other assets	19,096,395	9,035,935
Total assets	37,604,868	39,088,697
Current liabilities:
Accounts payable	215,705	267,513
Accrued liabilities	901,297	1,342,039
Deferred revenue	292,795	450,312
Operating lease liability	236,570	236,225
Income taxes payable	5,281	87,237
Total current liabilities	1,651,648	2,383,326
Long-term liabilities:
Deferred compensation	2,110,507	1,997,120
Deferred revenue	117,402	113,003
Operating lease liability	2,602,838	2,787,970
Total long-term liabilities	4,830,747	4,898,093
Total liabilities	6,482,395	7,281,419
Stockholders' equity:
Common stock, $0.005 par value, authorized 20,000,000 shares; issued and outstanding 9,254,795 and 9,234,795, respectively	46,274	46,174
Paid in capital	13,269,630	13,113,993
Retained earnings	17,806,569	18,647,111
Total stockholders' equity	31,122,473	31,807,278
Total liabilities and stockholders' equity	$ 37,604,868	$ 39,088,697