STOCK REPURCHASE PROGRAM (Narrative) (Details) - Koss Stock Repurchase Program [Member] - USD ($)	12 Months Ended	363 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Apr. 30, 1995
Share Repurchase Program [Line Items]
Stock repurchase program, amount authorized	$ 45,500,000		$ 45,500,000	$ 2,000,000
Payments for repurchase of common stock	$ 0	$ 0	$ 43,360,247

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.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

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- Definition

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

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- Definition

The cash outflow to reacquire common stock during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 15
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-15

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