UNAUTHORIZED TRANSACTION RELATED COSTS AND RECOVERIES, UNAUTHORIZED TRANSACTION RELATED COSTS AND (RECOVERIES), NET (Details) (USD $)	3 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Unauthorized Transactions, Related Costs and Recoveries [Abstract]
Legal fees incurred	$ 71,304	$ 448,906
Recoveries:
Insurance proceeds	(13,108)	(499,320)
Proceeds from asset forfeitures	(440,923)	0
Total recoveries	(454,031)	(499,320)
Unauthorized transaction related recoveries, net	$ (382,727)	$ (50,414)

This element represents the total of net expenses related to recognition of unauthorized transactions in accounts during the reporting period from the previous years, for example, legal expenses recoveries denote recoveries from insurance claims.

No definition available.

Name:	koss_UnauthorizedTransactionRelatedCostsAndRecoveriesNet
Namespace Prefix:	koss_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration