Document and Entity Information Document	9 Months Ended
	Jun. 30, 2012	Aug. 03, 2012
Entity Information:
Entity Registrant Name	EMCORE CORPORATION
Entity Central Index Key	0000808326
Document Type	10-Q
Document Period End Date	Jun. 30, 2012
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2012
Current Fiscal Year End Date	--09-30
Entity Filer Category	Accelerated Filer
Amendment Flag	false
Entity Common Stock, Shares Outstanding		24,060,945