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UNAUTHORIZED TRANSACTION RELATED COSTS AND RECOVERIES, NARRATIVE (Details) (USD $) | 12 Months Ended
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Jun. 30, 2012
Unauthorized Transactions, Related Costs and Recoveries [Abstract] |
Unauthorized transactions total, approximate, FY2005 through December 2009 | $ 31,500,000

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- Details
Name: | koss_UnauthorizedTransactionsRelatedCostsAndRecoveriesAbstract
Namespace Prefix: | koss_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Unauthorized transactions total, approximate, FY2005 through December 2009 + References No definition available. + Details
Name: | koss_UnauthorizedTransactionsTotalApproximateFy2005ThroughDecember2009
Namespace Prefix: | koss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration