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LEGAL MATTERS LEGAL MATTERS (Details) (USD $) | 12 Months Ended
--- | ---
Jun. 30, 2013 | Jun. 30, 2012
Commitments and Contingencies Disclosure [Abstract] |  |
Proceeds from the settlement of the third party lawsuit, gross | $ 8,500,000 | $ 0
Proceeds from the settlement of the third party lawsuit, net of legal fees | $ 6,380,000 |

X
- Definition Gross proceeds from legal settlements included in income for the period, related to unauthorized transactions + References No definition available. + Details
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Namespace Prefix: | koss_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gain Contingency, net proceeds + References No definition available. + Details
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Namespace Prefix: | koss_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration