Stockholders' Equity - Schedule of Allocation of Stock-based Compensation (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2020 |
Jun. 30, 2019 |
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| Stock-based compensation expense | $ 554 | $ 930 | $ 1,510 | $ 1,998 |
| Cost of product sales | ||||
| Stock-based compensation expense | 22 | 17 | 44 | 92 |
| Research and development cost | ||||
| Stock-based compensation expense | 15 | 19 | 120 | 134 |
| General and administrative expense | ||||
| Stock-based compensation expense | $ 517 | $ 894 | $ 1,346 | $ 1,772 |
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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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