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

Collaboration and Stock Purchase Agreements - Additional Information (Detail)

v3.19.1

Collaboration and Stock Purchase Agreements - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended
	Feb. 08, 2019	Jan. 30, 2019	Mar. 31, 2019	Mar. 31, 2018	Nov. 12, 2018
Revenues			$ 6,477	$ 5,903
Business Acquisition, Percentage of Voting Interests Acquired					33.30%
Business Combination, Contingent Consideration, Liability					$ 180,000
Contingent Earn Out Payments Measurement Second Model			at any time beginning on January 1, 2029 that IV Tramadol has generated at least $1.5 billion in aggregate Net Sales, then with respect to each calendar year in which IV Tramadol generates $100 million or more in Net Sales, each Holder shall be entitled to receive their pro rata share of an amount equal to 20% of the Gross Profit generated by IV Tramadol
Caelum [Member]
Sale of Stock, Consideration Received on Transaction		$ 30,000
Sale of Stock Percentage of Shares Transferred on Transaction		19.90%
Sales [Member] \| Avenue [Member]
Revenues			$ 325,000
Slab One [Member] \| Avenue [Member]
Gross Profit Percentage To Net Sales			10.00%
Slab One [Member] \| Sales [Member] \| Avenue [Member]
Revenues			$ 400,000
Slab Two [Member] \| Avenue [Member]
Gross Profit Percentage To Net Sales			12.50%
Slab Two [Member] \| Sales [Member] \| Avenue [Member] \| Maximum [Member]
Revenues			$ 500,000
Slab Two [Member] \| Sales [Member] \| Avenue [Member] \| Minimum [Member]
Revenues			$ 400,000
Slab Three [Member] \| Avenue [Member]
Gross Profit Percentage To Net Sales			15.00%
Slab Three [Member] \| Sales [Member] \| Avenue [Member]
Revenues			$ 500,000
SPMA [Member]
Business Combination, Consideration Transferred	$ 7,000
First Stage Member [Member] \| SPMA [Member]
Business Combination, Consideration Transferred	$ 31,500

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