Quarterly report pursuant to Section 13 or 15(d)

Related Party Note - Additional Information (Detail)

v2.4.1.9
Related Party Note - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2015
Related Party Transaction [Line Items]  
Costs and Expenses, Related Party $ 40,000us-gaap_CostsAndExpensesRelatedParty
Collaboration Agreement with TGTX [Member]  
Related Party Transaction [Line Items]  
Payments for Fees $ 500,000us-gaap_PaymentsForFees
/ fbio_TypeOfAgreementAxis
= fbio_CollaborationAgreementWithTgtxMember