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Condensed Consolidated Financial Statements Detail - Equity Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Equity Securities |  |  |  |  |
Long-term equity securities |  |  |  |  | $ 1,693
Gain (loss) recognized due to change in fair value of investment |  |  | $ (482) | $ 1,891 |
Rezolute [Member] |  |  |  |  |
Equity Securities |  |  |  |  |
Long-term equity securities | $ 1,200 |  | 1,200 |  | $ 1,700
Gain (loss) recognized due to change in fair value of investment | $ (1,100) | $ 2,000 | $ (500) | $ 1,900 |

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