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Basis of Presentation and Summary of Significant Accounting Policies - Commercial License and Other Economic Rights (Details) - Commercial license rights - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Commercial License and Other Economic Rights |  |  |
Gross | $ 38,298 | $ 38,298 |
Adjustments | (27,464) | (18,208) |
Net | 10,834 | 20,090 |
Accumulated amortization on finite-lived intangible assets | (21,500) |  |
Credit loss adjustments of finite-lived intangible assets | (6,000) |  |
Aziyo and CorMatrix |  |  |
Commercial License and Other Economic Rights |  |  |
Gross | 17,696 | 17,696 |
Adjustments | (9,644) | (5,500) |
Net | 8,052 | 12,196 |
Palvella |  |  |
Commercial License and Other Economic Rights |  |  |
Gross | 10,000 | 10,000 | $ 10,000
Adjustments | (10,000) | (7,492) |
Net | 0 | 2,508 |
Selexis and Dianomi |  |  |
Commercial License and Other Economic Rights |  |  |
Gross | 10,602 | 10,602 |
Adjustments | (7,820) | (5,216) |
Net | $ 2,782 | $ 5,386 |

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