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v3.23.2

Leases (Narrative) (Details) | 12 Months Ended
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Jun. 30, 2023 USD ($)
Lessee, Lease, Description [Line Items] |
Lease renewal term | 5 years
Lease extension per year | $ 380,000
Additional Renewal [Member] |
Lessee, Lease, Description [Line Items] |
Lease extension per year | $ 397,000

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- Definition Lease Extension Per Year + References No definition available. + Details
Name: | koss_LeaseExtensionPerYear
Namespace Prefix: | koss_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_LeaseContractualTermAxis=koss_AdditionalRenewalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |