Document and Entity Information Document	3 Months Ended
	Sep. 28, 2012	Nov. 01, 2012
Document Information [Line Items]
Entity Registrant Name	SILICON GRAPHICS INTERNATIONAL CORP.
Entity Central Index Key	0001316625
Current Fiscal Year End Date	--06-28
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 28, 2012
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		33,128,803