ACCOUNTS RECEIVABLE, NARRATIVE (Details)	Jun. 30, 2012 Rate	Jun. 30, 2011 Rate
Receivables [Abstract]
Percent of gross accounts receivable with two largest customers	31.00%	35.00%
Foreign accounts receivable denominated in US dollars, percentage	30.00%	23.00%

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