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STOCK REPURCHASE PROGRAM (Narrative) (Details) - Koss Stock Repurchase Program [Member] - USD ($) | 12 Months Ended | 363 Months Ended |
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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 |

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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 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 + Details
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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 + Details
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