PRODUCT SOFTWARE DEVELOPMENT EXPENDITURES - NARRATIVE (Details) (USD $)	12 Months Ended
Jun. 30, 2014	Sep. 30, 2013	Jun. 30, 2013
Capitalized Computer Software, Net [Abstract]
Capitalized computer software, amortization period	3 years
Remaining 9/30/13 asset value charged to Statement of Operations line item titled Impairment of capitalized software, inventory and related items	$ 0	$ 2,308,752	$ 2,673,291

The carrying amount of capitalized product software expenditures, net of accumulated amortization, as of the balance sheet date.

No definition available.

Name:	koss_ProductSoftwareDevelopmentExpendituresNet
Namespace Prefix:	koss_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant