Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.4.0.3
Stockholders' Equity - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Jul. 15, 2016
Jan. 08, 2016
Jul. 15, 2015
Mar. 30, 2016
Mar. 28, 2016
Feb. 29, 2016
Feb. 23, 2016
Jan. 31, 2016
Feb. 28, 2014
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Stock-based compensation weighted-average vesting period                   1 month 6 days    
Employee Stock Purchase Plan to eligible employees, Reckoning fair value percentage during offering period                   85.00%    
Employee Stock Purchase Plan to eligible employees, compensation expense recognized                   $ 0 $ 9,000  
Share Price                   $ 9.61    
Research And Development Expense                   $ 7,736,000 1,642,000  
General And Administrative Expense                   7,932,000 $ 3,490,000  
Allocated Share-based Compensation Expense                   $ 1,100,000    
Fair Value Assumptions, Weighted Average Volatility Rate                   25.60%    
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross                   0 1,500,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options                   $ 62,000    
Share-based Compensation                   $ 2,866,000 $ 1,470,000  
Stock Issued During Period, Shares, New Issues             10,000          
Long-Term Incentive Program [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Class of Warrant or Right, Outstanding     500,000                  
Weighted Market Value Percentage of Invested Capital 44.80%                      
Weighted Average Cost Percentage of Capital 30.00%                      
Capital Units, Authorized               100,000,000        
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Shares Granted               1.00%        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost, Total     $ 2,200,000                  
Checkpoint s 2015 Incentive Plan [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 Volatility Rate   83.00%                    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate   1.50%                    
Share Price   $ 4.39                    
Checkpoint [Member] | Private Placement [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Class of Warrant or Right, Exercise Price of Warrants or Rights             $ 7.00          
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total             $ 126,640          
Class of Warrant or Right, Number of Securities Called by Warrants or Rights             3,500          
Warrant Purchase Price Per Unit             $ 45,000          
Warrants Issued             44,324          
Proceeds from Issuance of Private Placement             $ 600,000          
Chief Executive Officer [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           1,900,000     3,900,000      
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost           $ 400,000            
Dr. Rosenwald [Member] | Long-Term Incentive Program [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period               510,434        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value               $ 2.37        
Mr. Weiss [Member] | Long-Term Incentive Program [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period               510,434        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value               $ 2.4        
Director [Member] | Checkpoint s 2015 Incentive Plan [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total   50,000                    
Employee [Member] | Checkpoint s 2015 Incentive Plan [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total                   50,000    
Avenue Therapeutics, Inc. [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Research And Development Expense                   $ 5,000    
Allocated Share-based Compensation Expense                   $ 9,000    
Weighted Market Value Percentage of Invested Capital                       44.80%
Weighted Average Cost Percentage of Capital                       30.00%
Shares Issued, Price Per Share                       $ 0.146
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%
Journey Medical Corporation [Member] | Employee [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Weighted Market Value Percentage of Invested Capital               44.50%        
Weighted Average Cost Percentage of Capital               30.00%        
Shares Issued, Price Per Share               $ 0.65        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total               305,000        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate               0.00%        
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 Volatility Rate                   83.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate                   1.50%    
Share Price                   $ 4.39 $ 0.065  
Allocated Share-based Compensation Expense                   $ 800,000    
Fair Value Assumptions, Weighted Average Volatility Rate                     30.00%  
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 Average Cost Percentage of Capital                     44.80%  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value                   $ 4.39    
JMC [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Allocated Share-based Compensation Expense                   $ 181,000    
Helocyte Inc [Member] | Consultants [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 Volatility Rate         83.00%              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate         1.50%              
Share Price         $ 0.097              
Stock Issued During Period, Shares, Issued for Services         150,000              
Helocyte Inc [Member] | Chief Executive Officer [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Share Price       $ 0.097                
Stock Issued During Period, Shares, Issued for Services       1,000,000                
Research and Development Expense [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Allocated Share-based Compensation Expense                   1,300,000 $ 300,000  
General and Administrative Expense [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Allocated Share-based Compensation Expense                   1,600,000 $ 1,200,000  
General and Administrative Expense [Member] | Checkpoint s 2015 Incentive Plan [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Share-based Compensation                   300,000    
General and Administrative Expense [Member] | Helocyte Inc [Member] | Consultants [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Share-based Compensation                   62,000    
General and Administrative Expense [Member] | Helocyte Inc [Member] | Chief Executive Officer [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Share-based Compensation                   $ 500,000    
Restricted Stock [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Stock-based compensation weighted-average vesting period                   2 years 8 months 12 days    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options                   $ 4,100,000    
Restricted Stock [Member] | General and Administrative Expense [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Share-based Compensation                   $ 35,000    
Restricted Stock Units (RSUs) [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Stock-based compensation weighted-average vesting period                   1 year 3 months 18 days    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options                   $ 700,000    
Employee Stock Option [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Common Stock issued in connection with the first ESPP offering                   91,192    
Common Stock, Capital Shares Reserved for Future Issuance                   108,808    
Employee Stock Option [Member] | General and Administrative Expense [Member]                        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                        
Share-based Compensation                   $ 100,000