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ACCOUNTS RECEIVABLE, NARRATIVE (Details) (USD $) | 12 Months Ended
--- | ---
Jun. 30, 2013 Rate | Jun. 30, 2012 Rate
Receivables [Abstract] |  |
Net proceeds from the settlement of a lawsuit against a third party included in accounts receivable | $ 8,500,000 | $ 0
Percent of gross trade accounts receivable with two largest customers | 20.50% | 31.40%
Foreign trade accounts receivable denominated in US dollars, percentage | 16.00% | 32.00%

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- Definition Foreign accounts receivable denominated in US dollars + References No definition available. + Details
Name: | koss_ForeignAccountsReceivableDenominatedInUsDollar
Namespace Prefix: | koss_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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- Definition Percent of gross accounts receivable with two largest customers + References No definition available. + Details
Name: | koss_PercentOfGrossAccountsReceivableWithTwoLargestCustomers
Namespace Prefix: | koss_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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