| Document And Entity Information | Sep. 16, 2022 |
| Document And Entity Information | |
| Document Type | 8-K |
| Written Communications | false |
| Document Period End Date | Sep. 16, 2022 |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Registrant Name | iBio, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-35023 |
| Entity Tax Identification Number | 26-2797813 |
| Entity Address, Address Line One | 8800 HSC Parkway |
| Entity Address, City or Town | Bryan |
| Entity Address, State or Province | TX |
| Entity Address, Postal Zip Code | 77807 |
| City Area Code | 979 |
| Local Phone Number | 446-0027 |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | IBIO |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001420720 |
| Amendment Flag | false |
