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COMMITMENTS AND CONTINGENCIES - Schedule of Future Minimum Lease Payments (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Operating Lease    
2020, remainder $ 582  
2021 801  
2022 829  
2023 425  
Total lease payments 2,637  
Less: present value adjustment (460)  
Operating lease liabilities $ 2,177 $ 2,308