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SUBSEQUENT EVENTS - Additional Information (Detail) - Subsequent Event
$ / shares in Units, $ in Thousands
 1 Months Ended
Jan. 03, 2019
USD ($)
shares
Jan. 31, 2019
Employees
ServiceProvider
$ / shares
Subsequent Event [Line Items]    
Rights distributed (shares) | shares 1  
Period to receive warrants to purchase shares 6 months 1 day  
Termination fee payable $ 350  
Termination reimbursement Expense 200  
Termination fee receivable $ 1,000  
Salarius    
Subsequent Event [Line Items]    
Ownership percentage 80.10%  
Combined company    
Subsequent Event [Line Items]    
Ownership percentage 19.90%  
PICU    
Subsequent Event [Line Items]    
Number of Employees | Employees   119
Service provider | ServiceProvider   18
Price per unit | $ / shares   $ 362.84
PICU | Minimum    
Subsequent Event [Line Items]    
Vesting period   9 months
PICU | Maximum    
Subsequent Event [Line Items]    
Vesting period   4 years