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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Capital Leases [Abstract]        
Value of equipment acquired through capital lease arrangements $ 124   $ 124  
Interest expense under capital lease arrangements 0 $ 1 1 $ 5
Unamortized balance of equipment acquired through capital lease arrangements 0   0  
Future Minimum Lease Payments under Non-cancelable Operating Lease [Abstract]        
Remainder of 2021 264   264  
2022 1,186   1,186  
2023 1,463   1,463  
2024 1,507   1,507  
2025 1,552   1,552  
Thereafter 3,245   3,245  
Total future minimum rental payments 9,217   9,217  
Licenses Related to Certain Intellectual Property [Abstract]        
Annual minimum fixed payments 220   220  
Other Commitments [Abstract]        
Employer matching contributions to 401(k) plan $ 0 $ 0 0 $ 0
HighCape [Member]        
Contingencies [Abstract]        
Payment to third party service provider in connection with Business Combination     $ 3,800