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Commitments and Contingencies - Contingent Consideration (Details) - USD ($) $ in Thousands | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019 | [1] | Apr. 07, 2019 | Feb. 25, 2019
Commitments And Contingencies |  |  |  |
Contingent consideration under royalty purchase agreements | $ 75 | $ 75 |  |
Change in fair value | 0 |  |  |
Aronora |  |  |  |
Commitments And Contingencies |  |  |  |
Milestone liability | 0 |  |  |
Royalty Purchase Agreement | Bioasis Technologies Inc |  |  |  |
Commitments And Contingencies |  |  |  |
Contingent consideration under royalty purchase agreements |  |  |  | $ 100
Royalty Purchase Agreement | Aronora |  |  |  |
Commitments And Contingencies |  |  |  |
Contingent consideration under royalty purchase agreements |  |  | $ 3,000 |
Change in fair value | 0 |  |  |
Estimated fair value of contingent consideration | $ 0 |  |  |
[1] | The consolidated balance sheet as of December 31, 2019 has been derived from the audited consolidated financial statements as of that date included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019.

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