Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.8.0.1
Commitments and Contingencies - Additional Information (Detail)
€ in Millions
 1 Months Ended 12 Months Ended
Aug. 02, 2017
EUR (€)
Oct. 03, 2014
USD ($)
Nov. 30, 2017
USD ($)
Oct. 27, 2017
USD ($)
a
Sep. 30, 2017
USD ($)
Aug. 31, 2017
EUR (€)
Jun. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2016
USD ($)
Jul. 31, 2016
USD ($)
a
Oct. 31, 2015
USD ($)
ft²
Apr. 30, 2013
USD ($)
ft²
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2012
USD ($)
ft²
Dec. 31, 2017
EUR (€)
Dec. 31, 2016
EUR (€)
Mar. 20, 2012
EUR (€)
Operating Leased Assets [Line Items]                                      
Land Subject to Ground Leases                   2,295 6,100         8,700      
Operating Leases, Rent Expense   $ 2,700,000         $ 55,000     $ 53,000 $ 200,000         $ 100,000      
Operating Leases, Rent Expense, Net, Total                         $ 1,200,000 $ 1,800,000 $ 400,000        
Lease Expiration Period                     5 years                
Prepaid Rent                         1,000,000   200,000        
Accounts Payable and Accrued Liabilities, Current                         36,127,000 24,295,000       € 2.5  
Legal Fees         $ 1,500,000       $ 200,000                    
Payments of Stock Issuance Costs                         2,804,000 0 0        
Letter of Credit [Member]                                      
Operating Leased Assets [Line Items]                                      
Operating Leases, Rent Expense         4,300,000                            
Collateralized Agreements         1,400,000     $ 400,000 $ 400,000                    
Increase (Decrease) in Security Deposits       $ 1,000,000                              
General and Administrative Expense [Member]                                      
Operating Leased Assets [Line Items]                                      
Legal Fees     $ 2,200,000                                
New York, NY office space [Member]                                      
Operating Leased Assets [Line Items]                                      
Lease Expiration Period   15 years                                  
Opus Point Partners Management, LLC [Member]                                      
Operating Leased Assets [Line Items]                                      
Operating Leases, Rent Expense   $ 300,000                                  
Percentage of Rentable Area   10.00%                                  
Prepaid Rent                         1,000,000 1,300,000 200,000        
TG Therapeutics, Inc [Member]                                      
Operating Leased Assets [Line Items]                                      
Operating Leases, Rent Expense   $ 1,100,000                                  
Percentage of Rentable Area   45.00%                                  
Journey Medical Corporation [Member]                                      
Operating Leased Assets [Line Items]                                      
Operating Leases, Rent Expense, Net, Total                         0 100,000 0        
TSO Laboratories, Inc [Member]                                      
Operating Leased Assets [Line Items]                                      
Operating Leases, Rent Expense               200,000                      
Operating Leases, Income Statement, Sublease Revenue               $ 8,200                      
Lease Expiration Date                               Feb. 28, 2018      
Operating Leases, Rent Expense, Sublease Rentals         $ 200,000                            
Mustang [Member]                                      
Operating Leased Assets [Line Items]                                      
Land Subject to Ground Leases | a       27,043                              
Operating Leases, Rent Expense, Net, Total                         0.1 0 $ 0        
Payments for Legal Settlements     $ 200,000                                
Operating Leases, Rent Expense, Sublease Rentals       $ 3,600,000                              
Land Improvements       3,500,000                              
Security Deposit       800,000                              
Increase (Decrease) in Security Deposits       1,300,000                              
Mustang [Member] | Cash [Member]                                      
Operating Leased Assets [Line Items]                                      
Security Deposit       300,000                              
Increase (Decrease) in Security Deposits       300,000                              
Mustang [Member] | Letter of Credit [Member]                                      
Operating Leased Assets [Line Items]                                      
Increase (Decrease) in Security Deposits       $ 500,000                              
Dr.Falk Pharma [Member]                                      
Operating Leased Assets [Line Items]                                      
Contractual Obligation | €                                     € 2.5
Loss Contingency, Damages Sought, Value | €           € 2.5                          
Loss Contingency, Damages Awarded, Value | € € 2.5                                    
Accounts Payable and Accrued Liabilities, Current                         $ 3,000,000 $ 2,600,000     € 2.5    
Lease Agreements [Member]                                      
Operating Leased Assets [Line Items]                                      
Land Subject to Ground Leases | ft²                       1,500              
Operating Leases, Rent Expense                       $ 100,000