Stockholders' Equity (Tables) |
6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2023 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Stock Option Activities |
The following table summarizes stock option activities for the six months ended June 30, 2023:
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| Schedule of Stock-Based Compensation Expense |
The following table summarizes stock-based compensation expense for the three and six months ended June 30, 2023, and 2022 (in thousands):
(1) The credit in research and development stock-based compensation expense reflects the reversal of expense related to Restricted Stock Unit forfeitures during the three months ended June 30, 2023. |
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| Summary of Warrant Activities |
A summary of warrant activities for the six months ended June 30, 2023, is presented below:
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| Restricted Stock Awards [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedules of Restricted Stock and Restricted Stock Unit Activity |
The following table summarizes restricted stock award activities for the six months ended June 30, 2023:
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| Restricted Stock Units [Member] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedules of Restricted Stock and Restricted Stock Unit Activity |
Certain employees and consultants have been awarded restricted stock units with time-based vesting. The following table summarizes restricted stock units’ activities for the six months ended June 30, 2023:
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