Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.3.0.814
Stockholders' Equity - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 08, 2015
Jul. 15, 2015
Jul. 28, 2015
Jun. 30, 2013
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock-based compensation expense related to all unvested stock option         $ 100,000       $ 100,000    
Stock-based compensation weighted-average vesting period                 1 year 11 months 12 days    
Employee Stock Purchase Plan to eligible employees, Number of shares purchased by employees         77,875       77,875    
Employee Stock Purchase Plan to eligible employees, Number of shares available for future sales         122,125       122,125    
Employee Stock Purchase Plan to eligible employees, compensation expense recognized         $ 12,600     $ 4,200 $ 27,500 $ 19,900  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options         $ 3,200,000       $ 3,200,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition                 1 year 11 months 12 days    
Share Price         $ 9.49       $ 9.49    
Research And Development Expense         $ 9,073,000     1,609,000 $ 13,172,000 8,473,000  
General And Administrative Expense         7,129,000     2,737,000 14,376,000 7,218,000  
Stock Issued During Period, Value, Issued for Services                 1,000 4,000  
Employee Benefits And Share Based Compensation         8,501,000     1,484,000 $ 11,896,000 4,082,000  
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross                 0    
Acquisition Of License [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Allocated Share-based Compensation Expense         600,000       $ 900,000    
Consultants [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Allocated Share-based Compensation Expense                 $ 4,300,000    
Chief Executive Officer [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Allocated Share-based Compensation Expense         2,200,000            
Stock Issued During Period, Shares, Issued for Services                 1    
Mr. George Avgerinos [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   50.00%                  
Stock Issued During Period, Value, Issued for Services         1,400,000            
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost   $ 3,700,000                  
Mr. Avgerinos [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross       200,000              
David Barrett [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock Issued During Period, Value, Issued for Services         400,000            
Dov Klien [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   25.00%                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   4 years                  
Senior Vise President [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Research And Development Expense         3,700,000            
Allocated Share-based Compensation Expense         302,015,000,000            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage   10.00%                  
Former Board Of Director [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Allocated Share-based Compensation Expense         500,000            
Dr. Rosenwald [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   500,000                  
Mr. Weiss [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   500,000                  
Mustang [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Employee Benefits And Share Based Compensation                 $ 147,000    
Avenue Therapeutics, Inc. [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Weighted Market Value Percentage of Invested Capital           44.80%          
Weighted Average Cost Percentage of Capital           30.00%          
Shares Issued, Price Per Share           $ 0.146          
Stock Issued During Period, Value, Issued for Services         $ 14,700       37,600    
Employee Benefits And Share Based Compensation                 37,600    
Avenue Therapeutics, Inc. [Member] | Consultants [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock Issued During Period, Shares, Issued for Services         150,000 150,000          
Stock Issued During Period, Value, Issued for Services         $ 15,000       37,600    
Avenue Therapeutics, Inc. [Member] | Chief Executive Officer [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock Issued During Period, Shares, Issued for Services           1,000,000          
Avenue Therapeutics, Inc. [Member] | Share-based Compensation Award, Tranche One [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage           50.00%          
Avenue Therapeutics, Inc. [Member] | Share-based Compensation Award, Tranche Two [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage           12.50%          
Avenue Therapeutics, Inc. [Member] | Share-based Compensation Award, Tranche Three [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage           50.00%          
Coronado SO Co. [Member] | Acquisition Of License [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Employee Benefits And Share Based Compensation                 178,500    
Mustang Bio, Inc [Member] | Acquisition Of License [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Employee Benefits And Share Based Compensation                 147    
Journey Medical Corporation [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock-based compensation expense related to all unvested stock option         500,000       $ 500,000    
Stock-based compensation weighted-average vesting period                 0 years    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition                 0 years    
Share Price     $ 0.65                
General And Administrative Expense         279,000       $ 279,000    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period                 1 year 25 days    
Weighted Market Value Percentage of Invested Capital     44.50%                
Weighted Average Cost Percentage of Capital     30.00%                
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross     1,950,000                
Journey Medical Corporation [Member] | Acquisition Of License [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Employee Benefits And Share Based Compensation                 $ 279,500    
Checkpoint Therapeutics, Inc [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term             5 years        
Share Price             $ 4.39        
Research And Development Expense         $ 2,100,000            
Allocated Share-based Compensation Expense                 1,500,000    
Fair Value Assumptions, Expected Volatility Rate             83.00%        
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total             $ 1,500,000        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage             25.00%        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period             48 months        
Weighted Market Value Percentage of Invested Capital   44.80%                  
Weighted Average Cost Percentage of Capital   30.00%                  
Employee Benefits And Share Based Compensation                 $ 2,100,000    
Fair Value Assumptions, Risk Free Interest Rate             1.54%   1.54%    
Debt Issuance Cost                 $ 12,600,000    
Debt Instrument, Offering Date Nov. 30, 2015                    
Checkpoint Therapeutics, Inc [Member] | Acquisition Of License [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Employee Benefits And Share Based Compensation                 $ 600,000    
Warrant [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Class of Warrant or Right, Outstanding         685,061       685,061   685,061
Class of Warrant or Right, Exercise Price of Warrants or Rights                     $ 6.65
Research and Development Expense [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Allocated Share-based Compensation Expense         $ 4,300,000     300,000 $ 5,200,000 900,000  
General and Administrative Expense [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Allocated Share-based Compensation Expense         $ 4,200,000     $ 1,200,000 $ 6,700,000 $ 3,100,000  
Restricted Stock [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock-based compensation weighted-average vesting period                 1 year 4 months 24 days    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition                 1 year 4 months 24 days    
Deferred Compensation Arrangement with Individual, Shares Issued                 290,000    
Restricted Stock Units (RSUs) [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross   50,000                  
Restricted Stock Units (RSUs) [Member] | Mr. George Avgerinos [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross   1,000,000                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares         300,000            
Restricted Stock Units (RSUs) [Member] | David Barrett [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross   133,000                  
Restricted Stock Units (RSUs) [Member] | Dov Klien [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Stock-based compensation expense related to all unvested stock option         $ 10,100,000       $ 10,100,000    
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross   40,000                  
New Award [Member] | Mr. George Avgerinos [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost   $ 3,300,000                  
Old Award [Member] | Mr. George Avgerinos [Member]                      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost   $ 400,000