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Debt - Senior Secured Term Loans (Details) |  | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 23, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Mar. 31, 2021 USD ($) | Jul. 31, 2020 USD ($) | May 31, 2020 USD ($) | May 26, 2020 | Dec. 19, 2019 USD ($)
Debt |  |  |  |  |  |  |  |  |
Amount borrowed |  |  |  |  |  |  |  |  | $ 3,000,000
Loss on extinguishment of debt |  | $ (247,000) | $ 5,748,000 | $ (483,000) |  |  |  |  |
Amount outstanding |  |  | 47,983,000 | 49,461,000 | $ 50,104,000 |  |  |  |
Senior Secured Term Loans |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Amount borrowed |  |  |  |  |  | $ 47,000,000 |  |  |
Maximum borrowing amount |  |  |  | 40,000,000 |  |  |  |  |
Amount outstanding |  |  |  | 40,000,000 |  | $ 37,645 | $ 37,500 |  |
Debt Instrument, Final Payment Fees |  |  |  | 500,000 |  |  |  |  |
Senior Secured Term Loans | Period beginning April 2, 2020 Through May 15, 2020 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Paid In Kind Interest Rate |  |  |  |  |  |  |  | 2.00 |
Senior Secured Term Loans | Period beginning After May 15, 2020 |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Paid In Kind Interest Rate |  |  |  |  |  |  |  | 1 |
Series C Redeemable Convertible Preferred Stock |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  |  | 2,532,000 |  |  |  |  |  |
Amount outstanding |  |  |  | $ 37,000 |  |  |  |  |
Debt Instrument, Final Payment Fees | $ 1,000,000 |  |  |  |  |  |  |  |
Warrants grant date fair value |  |  | $ 300,000 |  |  |  |  |  |
Prime rate | Senior Secured Term Loans |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Reduction in interest rate |  |  |  | 5 |  |  |  |  |
Base rate | Senior Secured Term Loans |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Reduction in interest rate |  |  |  | 4.00 |  |  |  |  |
Three-month LIBOR | Senior Secured Term Loans |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |
Warrants term |  |  |  | 3 months |  |  |  |  |
Warrant exercise price (percentage) |  |  |  | 2.5 |  |  |  |  |

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