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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 |

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