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Collaborative Research and License Agreements (Details) $ in Thousands |  |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 13, 2019 USD ($) agreements | Feb. 17, 2019 USD ($) target | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Collaboration revenue |  |  | $ 4,847 | $ 434 | $ 14,030 | $ 459 |
Current portion of deferred revenue |  |  |  |  |  |  | $ 21,873
Allergan Collaboration | Collaboration Arrangement |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Number of collaboration programs | agreements | 2 |  |  |  |  |  |
Non-refundable upfront payment received for research agreement | $ 25,000 |  |  |  |  |  |
Collaboration option exercise fee | 10,000 |  |  |  |  |  |
Collaboration option exercise fee | $ 10,000 |  |  |  |  |  |
Termination period upon written notice | 90 days |  |  |  |  |  |
Collaboration revenue |  |  | 4,833 |  | 13,949 |  |
Current portion of deferred revenue |  |  | 10,880 |  | 10,880 |  |
Dermelix License Agreement |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Aggregate regulatory milestone revenue |  | $ 13,500 |  |  |  |  |
Potential milestone revenue |  | 152,500 |  |  |  |  |
Dermelix License Agreement | Collaboration Arrangement |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Non-refundable upfront payment received for research agreement |  | 1,000 |  |  |  |  |
Collaboration option exercise fee |  | $ 1,000 |  |  |  |  |
Collaboration revenue |  |  | $ 14 | $ 434 | $ 81 | $ 459 |
Number of additional collaboration targets | target |  | 5 |  |  |  |  |
Collaboration agreement term |  | 6 years |  |  |  |  |
Collaboration development expenses |  | $ 1,000 |  |  |  |  |
Collaboration option rights usage term |  | 30 days |  |  |  |  |
Development and Commercialization License | Allergan Collaboration | Collaboration Arrangement |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Collaboration option exercise fee | $ 15,000 |  |  |  |  |  |
Maximum | Allergan Collaboration | Collaboration Arrangement |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |
Development milestone payment | 55,000 |  |  |  |  |  |
Product approval and launch milestone payment | 132,500 |  |  |  |  |  |
Sales milestone payment | $ 175,000 |  |  |  |  |  |

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