iBio Inc. Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Cantor Fitzgerald Underwriting) (Details) - USD ($)						9 Months Ended
	May 07, 2021	Feb. 24, 2021	Jan. 11, 2021	Dec. 10, 2020	Dec. 08, 2020	Mar. 31, 2021	Mar. 31, 2020	Nov. 25, 2020
Cost related to issuance of shares						$ 4,713,000	$ 381,000
Sales Agreement [Member] \| Cantor Fitzgerald [Member]
Aggregate offering price								$ 100,000,000
Net proceeds from issuance of shares		$ 238,000
Number of shares issued		113,200
Underwriting Agreement [Member] \| Cantor Fitzgerald [Member]
Number of shares agreed to be issued					29,661,017
Net proceeds from issuance of shares			$ 4,600,000	$ 32,300,000
Number of shares issued				29,660,000
Cost related to issuance of shares				$ 2,900,000
Over Allotment [Member] \| Underwriting Agreement [Member] \| Cantor Fitzgerald [Member]
Number of shares agreed to be issued					4,449,152
Net proceeds from issuance of shares			$ 4,600,000
Number of shares issued			4,240,828
Subsequent Event [Member] \| Sales Agreement [Member] \| Cantor Fitzgerald [Member]
Net proceeds from issuance of shares	$ 2,995,000
Subsequent Event [Member] \| Underwriting Agreement [Member] \| Cantor Fitzgerald [Member]
Net proceeds from issuance of shares	$ 2,995,000
Number of shares issued	1,716,800