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STOCK REPURCHASE PROGRAM (Details) | 12 Months Ended
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Jun. 30, 2018 USD ($)
Stock Purchase Agreement Disclosure [Abstract] |
Maximum amount Board will approve per repurchase | $ 2,000,000
Authorized amount | 45,500,000
Inception to date repurchased | $ 43,360,247

X
- Definition -- None. No documentation exists for this element. -- + References No definition available. + Details
Name: | koss_StockPurchaseAgreementDisclosureAbstract
Namespace Prefix: | koss_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount repurchased, inception to date, of stock for stock repurchase program + References No definition available. + Details
Name: | koss_StockRepurchaseProgramInceptionToDateRepurchased
Namespace Prefix: | koss_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount authorized by an entity's Board of Directors under a stock repurchase plan, per repurchase instance + References No definition available. + Details
Name: | koss_StockRepurchaseProgramMaximumAmountBoardWillApprovePerRepurchase
Namespace Prefix: | koss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant