Stockholders' Equity (Tables)
|
9 Months Ended |
Sep. 30, 2021 |
|---|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Schedule of Summarizes Stock Option Activities |
The following table summarizes stock option activities for the nine months ended September 30, 2021:
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Weighted Average |
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Remaining |
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Weighted Average |
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Contractual Life (in |
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|
Stock Options |
|
Exercise Price |
|
years) |
Outstanding at December 31, 2020 |
|
1,141,675 |
|
$ |
5.73 |
|
6.31 |
Outstanding at September 30, 2021 |
|
1,141,675 |
|
|
5.73 |
|
5.56 |
Options vested and exercisable at September 30, 2021 |
|
713,547 |
|
$ |
5.73 |
|
5.56 |
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| Schedule of Stock-Based Compensation Expense |
The following table summarizes stock-based compensation expense for the three and nine months ended September 30, 2021 and 2020 (in thousands):
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For the three months ended September 30, |
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For the nine months ended September 30, |
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|
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2021 |
|
2020 |
|
2021 |
|
2020 |
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General and administrative |
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$ |
229 |
|
$ |
348 |
|
$ |
793 |
|
$ |
1,213 |
|
Research and development |
|
|
655 |
|
|
258 |
|
|
1,634 |
|
|
1,155 |
|
Total stock-based compensation expense |
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$ |
884 |
|
$ |
606 |
|
$ |
2,427 |
|
$ |
2,368 |
|
|
| Summary of Warrant Activities |
A summary of warrant activities for the nine months ended September 30, 2021, is presented below:
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Weighted Average |
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Remaining |
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|
Weighted Average |
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Contractual Life (in |
|
|
Warrants |
|
Exercise Price |
|
years) |
Outstanding as of December 31, 2020 |
|
5,402,670 |
|
$ |
8.21 |
|
1.39 |
Expired |
|
(666,366) |
|
|
8.50 |
|
— |
Cashless exercised |
|
(138) |
|
|
— |
|
— |
Outstanding as of September 30, 2021 |
|
4,736,166 |
|
$ |
8.16 |
|
0.73 |
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| Restricted Stock Awards [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Schedules of Restricted Stock and Restricted Stock Unit Activity |
The following table summarizes restricted stock award activities for the nine months ended September 30, 2021:
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Weighted Average |
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Grant Date Fair |
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|
Number of Shares |
|
Value |
Nonvested at December 31, 2020 |
|
302,114 |
|
$ |
4.93 |
Granted |
|
68,870 |
|
|
3.63 |
Vested |
|
(90,001) |
|
|
6.69 |
Nonvested at September 30, 2021 |
|
280,983 |
|
$ |
4.05 |
|
| 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 nine months ended September 30, 2021:
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Weighted Average |
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|
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Grant Date Fair |
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|
Number of Units |
|
Value |
Nonvested at December 31, 2020 |
|
1,468,559 |
|
$ |
3.87 |
Granted |
|
1,100,000 |
|
|
3.45 |
Forfeited |
|
(298,687) |
|
|
3.64 |
Vested |
|
(298,690) |
|
|
4.29 |
Nonvested at September 30, 2021 |
|
1,971,182 |
|
$ |
3.60 |
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