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Commitments and Contingencies - Narrative (Details) - USD ($) |  | 3 Months Ended |
--- | --- | --- | ---
Feb. 01, 2019 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Loss Contingencies [Line Items] |  |  |  |
Percentage of annual rent escalation |  | 3.00% |  |
Purchase obligation |  | $ 20,500,000 |  |
Related party borrowings |  | 0 | $ 5,000,000 |
Loss contingency accrual |  | 0 |  | $ 0
Daewoong |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Milestone payment in connection with license and supply agreement | $ 2,000,000 | $ 11,500,000 |  |

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- Details
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