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LICENSE AGREEMENT (Details)
$ in Thousands
1 Months Ended 3 Months Ended 42 Months Ended
Oct. 03, 2019
USD ($)
Mar. 31, 2019
USD ($)
item
Jan. 31, 2019
USD ($)
Oct. 31, 2016
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Agreements                
Research and development         $ 7,271 $ 6,874    
General and administrative         5,196 1,855    
Operating expenses         12,467 8,729    
Accrued expenses and other current liabilities         6,496   $ 6,496 $ 4,950
Accounts payable         1,606   1,606 8,793
Columbia University                
Agreements                
Research and development         300 0    
General and administrative         40 $ 200    
Operating expenses             2,200  
Accrued expenses and other current liabilities         300   300 100
Accounts payable         $ 52   $ 52 $ 100
2016 license agreement | Columbia University                
Agreements                
Percentage of outstanding common stock issued       5.00%        
Fair value of stock issued       $ 500        
Written notice period for termination of agreement       90 days        
Written notice period for termination of agreement, uncured material breach       30 days        
Extended written notice period for termination of agreement, attempt to cure material breach       90 days        
2016 license agreement | Columbia University | Minimum                
Agreements                
Percentage of sublicensing revenue, if sublicenses rights granted       10.00%        
2016 license agreement | Columbia University | Maximum                
Agreements                
Payment on achievement of specified development and regulatory milestones       $ 1,300        
Payment on achievement of specified level of aggregate annual net sales       $ 1,000        
Percentage of sublicensing revenue, if sublicenses rights granted       20.00%        
2019 license agreement | Columbia University                
Agreements                
Written notice period for termination of agreement     90 days          
Written notice period for termination of agreement, uncured material breach     30 days          
Extended written notice period for termination of agreement, attempt to cure material breach     90 days          
2019 license agreement | Columbia University | Minimum                
Agreements                
Percentage of sublicensing revenue, if sublicenses rights granted     10.00%          
2019 license agreement | Columbia University | Maximum                
Agreements                
Payment on achievement of specified development and regulatory milestones     $ 1,300          
Payment on achievement of specified level of aggregate annual net sales     $ 1,000          
Percentage of sublicensing revenue, if sublicenses rights granted     50.00%          
2019 research agreement | Columbia University                
Agreements                
Agreement term   12 months            
Written notice period for termination of agreement   30 days            
Number of parts | item   2            
2019 research agreement - Part I | Columbia University                
Agreements                
Agreement term   6 months            
Payment to be made   $ 100            
2019 research agreement - Part II | Columbia University                
Agreements                
Agreement term   6 months            
Payment to be made   $ 200            
P13k Research agreement | Columbia University                
Agreements                
Agreement term 18 months              
Written notice period for termination of agreement 30 days              
Operating expenses $ 400