Stockholders' Equity - Stock-based compensation expense (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
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| Share-based Compensation | $ 805 | $ 432 |
| General and administrative | ||
| Share-based Compensation | 352 | 336 |
| Research and development | ||
| Share-based Compensation | $ 453 | $ 96 |
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- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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- Details
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