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Debt (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 19, 2019
--- | --- | --- | --- | ---
Debt |  |  |  |
Principal | $ 53,088 | $ 50,831 | $ 54,031 |
Unaccreted Discount | (2,984) | (2,819) | (3,824) |
Debt Issuance Costs |  | (29) | (746) |
Carrying Value | 50,104 | 47,983 | 49,461 |
Interest rate (stated) |  |  |  | 3.00%
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
2021 |  | 4,799 |  |
2022 |  | 12,234 |  |
2023 |  | 20,346 |  |
2024 |  | 13,302 |  |
2025 |  | 150 |  |
Total principal | 53,088 | $ 50,831 | 54,031 |
10% convertible promissory notes |  |  |  |
Debt |  |  |  |
Principal |  |  | 7,324 |
Unaccreted Discount |  |  | (36) |
Carrying Value |  |  | 7,288 |
Interest rate (stated) |  | 10.00% |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal |  |  | 7,324 |
6% promissory note, due 2020 |  |  |  |
Debt |  |  |  |
Principal |  |  | 185 |
Carrying Value |  |  | 185 |
Interest rate (stated) |  | 6.00% |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal |  |  | 185 |
2.55% promissory notes, due 2020 |  |  |  |
Debt |  |  |  |
Principal |  |  | 1,100 |
Unaccreted Discount |  |  | (41) |
Carrying Value |  |  | 1,059 |
Interest rate (stated) |  | 2.55% |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal |  |  | 1,100 |
3.5% convertible promissory note, due 2022 |  |  |  |
Debt |  |  |  |
Principal |  |  | 1,689 |
Unaccreted Discount |  |  | (313) |
Carrying Value |  |  | 1,376 |
Interest rate (stated) |  | 3.50% |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal |  |  | 1,689 |
9.0% term loan, due 2023 |  |  |  |
Debt |  |  |  |
Principal |  |  | 40,500 |
Unaccreted Discount |  |  | (528) |
Debt Issuance Costs |  |  | (689) |
Carrying Value |  |  | 39,283 |
Interest rate (stated) |  | 9.00% |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal |  |  | 40,500 |
3% promissory note, due 2024 |  |  |  |
Debt |  |  |  |
Principal |  |  | 3,000 |
Unaccreted Discount |  |  | (2,906) |
Debt Issuance Costs |  |  | (57) |
Carrying Value |  |  | 37 |
Interest rate (stated) |  | 3.00% |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal |  |  | 3,000 |
1.0% promissory notes, due 2022 |  |  |  |
Debt |  |  |  |
Principal | 10,343 | $ 8,317 |  |
Carrying Value | $ 10,343 | $ 8,317 |  |
Interest rate (stated) | 1.00% | 1.00% |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal | $ 10,343 | $ 8,317 |  |
11.05% term loan, due 2024 |  |  |  |
Debt |  |  |  |
Principal |  | 41,764 |  |
Unaccreted Discount |  | (2,686) |  |
Debt Issuance Costs |  | (29) |  |
Carrying Value |  | $ 39,049 |  |
Interest rate (stated) |  | 11.05% |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal |  | $ 41,764 |  |
Other notes |  |  |  |
Debt |  |  |  |
Principal | 600 | 750 | 233 |
Unaccreted Discount | (117) | (133) |  |
Carrying Value | 483 | 617 | 233 |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal | $ 600 | 750 | $ 233 |
10% convertible notes |  |  |  |
Debt |  |  |  |
Principal |  | 5,500 |  |
Fair Value |  | $ 11,659 |  |
Interest rate (stated) |  | 10.00% |  |
Long-term Debt, Fiscal Year Maturity [Abstract] |  |  |  |
Total principal |  | $ 5,500 |  |

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