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Subsequent Event - Narrative (Details) - USD ($) $ in Thousands | May 04, 2019 | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Commercial license rights |  |  |
Subsequent Event [Line Items] |  |  |
Definite lived intangible assets |  | $ 38,298 | $ 36,298
Subsequent Event | Novan | Commercial license rights |  |  |
Subsequent Event [Line Items] |  |  |
Definite lived intangible assets | $ 12,000 |  |
Contract asset | $ 20,000 |  |
Subsequent Event | Novan | Royalty Agreements | Minimum |  |  |
Subsequent Event [Line Items] |  |  |
Tiered royalty rate (as a percent) | 7.00% |  |
Subsequent Event | Novan | Royalty Agreements | Maximum |  |  |
Subsequent Event [Line Items] |  |  |
Tiered royalty rate (as a percent) | 10.00% |  |

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