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NOTES PAYABLE - Additional Information (Details) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 31, 2020 | Dec. 31, 2020 | Aug. 10, 2020 | May 01, 2020
Debt Instrument [Line Items] |  |  |  |
Proceeds from issuance of notes payable |  | $ 1,067 |  |
Hyperfine PPP loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount of note payable |  |  | $ 889 |
Liminal PPP loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Amount of note payable |  |  |  | $ 178
Payroll Protection Program |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Proceeds from issuance of notes payable | $ 1,067 |  |  |

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