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Debt - Summary of Interest Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Debt Instrument [Line Items] |  |  |  |
Interest expense | $ 273 | $ 1,845 | $ 654 | $ 4,064
Accretion of debt discount - issuance costs | 103 | 1,121 | 258 | 1,741
Accretion of debt discount - warrants | 0 | 0 | 0 | 1,029
2021 Promissory Note |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest expense | 122 | 0 | 300 | 0
2020 Convertible Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest expense | 0 | 659 | 0 | 1,111
Other Debt |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest expense | $ 48 | $ 65 | $ 96 | $ 183

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