Quarterly report pursuant to Section 13 or 15(d)

Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail)

v2.4.1.9
Licenses Acquired - Summary Of Research and Development Arrangement Contract (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total $ 7,439us-gaap_ResearchAndDevelopmentInProcess $ 0us-gaap_ResearchAndDevelopmentInProcess
EGFR inhibitors [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 1,000us-gaap_ResearchAndDevelopmentInProcess
/ us-gaap_ProductOrServiceAxis
= fbio_EgfrInhibitorsMember 		 
IV Tramadol [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 2,000us-gaap_ResearchAndDevelopmentInProcess
/ us-gaap_ProductOrServiceAxis
= fbio_IvTramadolMember 		 
Mustang Therapeutics, Inc [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 2,260us-gaap_ResearchAndDevelopmentInProcess
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fbio_MustangTherapeuticsIncMember 		[1]  
Checkpoint Therapeutics, Inc [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total 1,000us-gaap_ResearchAndDevelopmentInProcess
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fbio_CheckpointTherapeuticsIncMember 		 
Coronado SO Co, Inc [Member]    
Research and Development Arrangement, Contract to Perform for Others [Line Items]    
Research and Development Total $ 1,179us-gaap_ResearchAndDevelopmentInProcess
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= fbio_CoronadoSoCoIncMember 		[2]  
[1] Mustang: $2.0 million in cash and $260,000 of Mustang shares issued in connection with acquiring the license.
[2] Coronado SO: $929,000 in cash and $250,000 of Coronado SO shares issued in connection with acquiring the license.