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Basis of Presentation and Summary of Significant Accounting Policies - Other Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
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Captisol manufacturing ramp up fee | $ 9,215 | $ 0
Long-term investment receivable | 2,000 | 0
Equity investment | 813 | 750
Deposits | 138 | 219
Other | 1,538 | 1,388
Total other assets | $ 13,704 | $ 2,357

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