Mustang Bio, Inc. Quarterly report pursuant to Section 13 or 15(d)

Clinical Trial and Sponsored Research Agreements (City of Hope - Sponsored Research and Clinical Trial Agreements) (Narrative) (Details)

Clinical Trial and Sponsored Research Agreements (City of Hope - Sponsored Research and Clinical Trial Agreements) (Narrative) (Details) - USD ($) $ in Thousands			1 Months Ended							3 Months Ended		6 Months Ended
	Sep. 08, 2021	Jul. 03, 2017	Nov. 30, 2022	Jan. 31, 2022	Nov. 30, 2020	Oct. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Feb. 28, 2017	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
License, Clinical Trial and Sponsored Research Agreements
Research and development expense										$ 10,836	$ 15,164	$ 24,836	$ 31,453
PSCA (MB-105) [Member] \| City of Hope National Medical Center ("COH") [Member]
License, Clinical Trial and Sponsored Research Agreements
Total reimbursement payments made										500		500
HER2 (MB 103) [Member] \| City of Hope National Medical Center ("COH") [Member]
License, Clinical Trial and Sponsored Research Agreements
Total reimbursement payments made										3,000		3,000
CD20 (MB-106) [Member] \| Fred Hutchinson Cancer Center [Member]
License, Clinical Trial and Sponsored Research Agreements
Total reimbursement payments made										8,300		8,300
ST. Jude - XSCID [Member] \| St. Jude Children's Research Hospital [Member]
License, Clinical Trial and Sponsored Research Agreements
Total reimbursement payments made										3,600		3,600
IL13Ra2 CAR and (C134) [Member]
License, Clinical Trial and Sponsored Research Agreements
Research and development expense			$ 600			$ 300
Sponsored Research and Clinical Trial Agreements [Member]
License, Clinical Trial and Sponsored Research Agreements
Research and development expense										1,634	1,456	3,375	3,048
Sponsored Research and Clinical Trial Agreements [Member] \| Mayo Clinic [Member]
License, Clinical Trial and Sponsored Research Agreements
Research and development expense										275	231	551	462
Sponsored Research and Clinical Trial Agreements [Member] \| CD123 (MB-102) [Member] \| City of Hope National Medical Center ("COH") [Member]
License, Clinical Trial and Sponsored Research Agreements
Contribution per patient									$ 100
Research and development expense											52	0	103
Sponsored Research and Clinical Trial Agreements [Member] \| IL13Ra2 (MB-101) [Member] \| City of Hope National Medical Center ("COH") [Member]
License, Clinical Trial and Sponsored Research Agreements
Contribution toward patient costs									$ 100
Contribution per patient						100
Research and development expense										326	234	636	462
Annual maintenance fee payable						200
Sponsored Research and Clinical Trial Agreements [Member] \| IL13Ra2 (MB-101) [Member] \| City of Hope National Medical Center ("COH") [Member] \| Maximum
License, Clinical Trial and Sponsored Research Agreements
Contribution toward patient costs												200
Sponsored Research and Clinical Trial Agreements [Member] \| CS1 (MB-104) [Member] \| City of Hope National Medical Center ("COH") [Member]
License, Clinical Trial and Sponsored Research Agreements
Research and development expense										139	50	188	100
Total reimbursement payments made										2,200		2,200
Sponsored Research and Clinical Trial Agreements [Member] \| CS1 (MB-104) [Member] \| City of Hope National Medical Center ("COH") [Member] \| Maximum
License, Clinical Trial and Sponsored Research Agreements
Milestones payable								$ 2,400
Sponsored Research and Clinical Trial Agreements [Member] \| PSCA (MB-105) [Member] \| City of Hope National Medical Center ("COH") [Member]
License, Clinical Trial and Sponsored Research Agreements
Research and development expense										22	28	44	50
Sponsored Research and Clinical Trial Agreements [Member] \| PSCA (MB-105) [Member] \| City of Hope National Medical Center ("COH") [Member] \| Maximum
License, Clinical Trial and Sponsored Research Agreements
Milestones payable						$ 2,300
Sponsored Research and Clinical Trial Agreements [Member] \| HER2 (MB 103) [Member] \| City of Hope National Medical Center ("COH") [Member]
License, Clinical Trial and Sponsored Research Agreements
Research and development expense											271	0	542
Sponsored Research and Clinical Trial Agreements [Member] \| HER2 (MB 103) [Member] \| City of Hope National Medical Center ("COH") [Member] \| Maximum
License, Clinical Trial and Sponsored Research Agreements
Milestones payable							$ 3,000
Sponsored Research and Clinical Trial Agreements [Member] \| CD20 (MB-106) [Member] \| Fred Hutchinson Cancer Center [Member]
License, Clinical Trial and Sponsored Research Agreements
Milestones payable		$ 5,300
Additional milestone payments				$ 2,200	$ 1,800
Contribution toward patient costs					$ 800
Research and development expense										544	358	1,098	846
Sponsored Research and Clinical Trial Agreements [Member] \| CD20 (MB-106) [Member] \| Fred Hutchinson Cancer Center [Member] \| Maximum
License, Clinical Trial and Sponsored Research Agreements
Additional milestone payments				$ 9,300
Sponsored Research and Clinical Trial Agreements [Member] \| ST. Jude - XSCID [Member] \| St. Jude Children's Research Hospital [Member]
License, Clinical Trial and Sponsored Research Agreements
Research and development expense										216	94	634	218
Sponsored Research and Clinical Trial Agreements [Member] \| RAG1 SCID (MB-110) [Member] \| Leiden University Medical Centre [Member]
License, Clinical Trial and Sponsored Research Agreements
Agreement term	5 years
Research and development expense										$ 112	$ 138	$ 224	$ 265
Annual maintenance fee payable	$ 500