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STANDBY EQUITY PURCHASE AGREEMENT AND CONVERTIBLE PROMISSORY NOTE - Derivative liability (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Jun. 10, 2022 | Dec. 31, 2022
Derivative liability |  |
Principal payments |  | $ 15,306,000
Convertible promissory note |  |
Derivative liability |  |
Debt discount and debt issuance costs | $ 404,000 |
Original issue discount | 300,000 |
Issuance costs | $ 104,000 |
Amortization period of debt costs and discount over term of debt | 6 months |
Effective interest rate of debt | 7.50% |
Amortization of debt issuance costs |  | 396,000
Contractual interest expense |  | 1,100,000
Principal payments |  | 15,300,000
Principal reduction |  | $ 168,000

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