Document Entity Information Document (USD $)	12 Months Ended
	Jun. 30, 2013	Sep. 06, 2013	Dec. 30, 2012
Document and Entity Information [Abstract]
Entity Registrant Name	OVERLAND STORAGE INC
Entity Central Index Key	0000889930
Current Fiscal Year End Date	--06-30
Entity Filer Category	Smaller Reporting Company
Document Type	10-K
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	No
Entity Common Stock, Shares Outstanding		31,118,558
Entity Public Float			$ 18,433,000