ACCOUNTS RECEIVABLE, NARRATIVE (Details)	Jun. 30, 2017 Rate	Jun. 30, 2016 Rate
Receivables [Abstract]
Trade accounts receivable, two largest customers, percentage	31.00%	18.00%
Foreign trade accounts receivable, denominated in US dollars, percentage	15.00%	28.00%

Percent of gross accounts receivable with two largest customers

No definition available.

Name:	koss_PercentOfGrossAccountsReceivableWithTwoLargestCustomers
Namespace Prefix:	koss_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant