Fortress Biotech, Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Sponsored Research and Clinical Trial Agreements - Summary of Mustang's expense related to its sponsored research agreements (Details)

Sponsored Research and Clinical Trial Agreements - Summary of Mustang's expense related to its sponsored research agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Research and Development in Process	$ 6,090	$ 4,050
Mustang [Member]
Research and Development in Process	1,350	1,275
Mustang [Member] \| Research and clinical trial agreements [Member]
Research and Development in Process	6,143	5,719
Mustang [Member] \| City of Hope CAR T development (multiple programs) [Member] \| Research and clinical trial agreements [Member]
Research and Development in Process	2,000	2,000
Mustang [Member] \| City of Hope MB-102 (CD123 CAR T for AML) [Member] \| Research and clinical trial agreements [Member]
Research and Development in Process	1,202	835
Mustang [Member] \| City of Hope MB-101 (IL13R2 CAR T for Glioblastoma) [Member] \| Research and clinical trial agreements [Member]
Research and Development in Process	876	1,056
Mustang [Member] \| City of Hope Manufacturing License [Member] \| Research and clinical trial agreements [Member]
Research and Development in Process	457	458
Mustang [Member] \| Fred Hutch MB-106 (CD20 CAR T for GBM & Metastatic Breast Cancer to Brain) [Member] \| Research and clinical trial agreements [Member]
Research and Development in Process	762	1,301
Mustang [Member] \| St. Jude's XSCID [Member] \| Research and clinical trial agreements [Member]
Research and Development in Process	777
Mustang [Member] \| Beth Israel Deaconess Medical Center - CRISPR (multiple programs)[Member] \| Research and clinical trial agreements [Member]
Research and Development in Process	$ 69	$ 69