Document And Entity Information - shares	3 Months Ended
	Sep. 30, 2017	Nov. 09, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Entity Registrant Name	iBio, Inc.
Entity Central Index Key	0001420720
Current Fiscal Year End Date	--06-30
Entity Filer Category	Smaller Reporting Company
Trading Symbol	IBIO
Entity Common Stock, Shares Outstanding		92,818,510