Document And Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2017	Sep. 15, 2017	Dec. 30, 2016
Document Information [Line Items]
Entity Registrant Name	iBio, Inc.
Entity Central Index Key	0001420720
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	--06-30
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 21,262,787
Trading Symbol	IBIO
Entity Common Stock, Shares Outstanding		92,818,510