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SUBSEQUENT EVENTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Feb. 17, 2021
Feb. 10, 2021
Mar. 30, 2021
Dec. 31, 2020
Subsequent Event [Line Items]        
Gross proceeds       $ 4,867
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Number of shares issued (in shares) 8,749,999   1,867,552  
Gross proceeds $ 40,200   $ 8,800  
Share price $ 4.60      
Subsequent Event [Member] | PRX-110 [Member] | SarcoMed [Member]        
Subsequent Event [Line Items]        
Initial cash payment   $ 3,500    
Term To Sign Supply Agreement   60 days    
Subsequent Event [Member] | Over-Allotment Option [Member]        
Subsequent Event [Line Items]        
Number of shares issued (in shares) 1,141,304