Fortress Biotech, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Related Party Transactions (Narrative) (Details)

v3.23.1

Related Party Transactions (Narrative) (Details) - USD ($)		3 Months Ended
	May 11, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Related Party Transaction [Line Items]
Revenue from TGTX		$ 35,000	$ 52,000
Total notes payable		92,314,000		$ 91,730,000
Interest expense, interest		$ 3,320,000	1,961,000
Avenue Therapeutics, Inc [Member]
Related Party Transaction [Line Items]
Paid in Kind dividend as a percentage of fully diluted outstanding capitalization		2.50%
Journey
Related Party Transaction [Line Items]
Proceeds from Related Party Agreement		$ 15,000	100,000
Chief Executive Officer (Dr. Rosenwald) [Member]
Related Party Transaction [Line Items]
Interest own in percent by principal stockholder or director		11.80%
Executive Vice Chairman [Member]
Related Party Transaction [Line Items]
Interest own in percent by principal stockholder or director		11.30%
Shared Services Agreement [Member] \| TGTX [Member]
Related Party Transaction [Line Items]
Revenue from TGTX		$ 100,000	100,000
Desk Share Agreements [Member] \| TGTX [Member] \| New York, NY Office Space [Member]
Related Party Transaction [Line Items]
Revenue from TGTX		500,000	500,000
Related party transaction, receivables		300,000
Total payment for rent		$ 800,000	$ 900,000
Stock Contribution Agreement [Member] \| Avenue Therapeutics, Inc [Member]
Related Party Transaction [Line Items]
Percentage of common and preferred shares to be transferred to partner company.	100.00%
Minimum proceeds required for closing of equity financing	$ 7,500,000
Percentage of partner company shares to be repurchased by partner company in stock contribution agreement	100.00%

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