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Collaboration and Licensing Revenue - Fibrocell Science Collaboration (Details) - Fibrocell Science, Inc. - USD ($) $ in Thousands | 1 Months Ended | 9 Months Ended
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Apr. 30, 2019 | Sep. 30, 2019
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |
Collaboration agreement, percentage of sublicensing income | 50.00% |
Collaboration and licensing agreements |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |
Collaborative arrangement consideration received, cash |  | $ 3,750

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- Details
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- Details
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