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COMMITMENTS AND CONTINGENCIES, BUILDING LEASE (Details) (USD $) | 12 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011
Commitments and Contingencies Disclosure [Abstract] |  |
Term | 5 years |
Annual lease commitment | $ 380,000 |
Rent expense | $ 380,000 | $ 380,000

X
- Definition Operating leases, annual lease commitment + References No definition available. + Details
Name: | koss_OperatingLeasesAnnualLeaseCommitment
Namespace Prefix: | koss_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

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- Definition Length in years of operating lease for building + References No definition available. + Details
Name: | koss_OperatingLeasesTerm
Namespace Prefix: | koss_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration