Stock Options, Restricted Stock Units and Warrants (Tables)
|
9 Months Ended |
Sep. 30, 2022 |
|---|
| Stock Options, Restricted Stock Units And Warrants [Abstract] |
|
| Schedule of stock based compensation |
| |
|
Three months ended
September 30, |
|
|
Nine months ended
September 30, |
|
| |
|
2022 |
|
|
2021 |
|
|
2022 |
|
|
2021 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
| Research and development expenses |
|
$ |
136 |
|
|
$ |
113 |
|
|
$ |
636 |
|
|
$ |
647 |
|
| Selling, general and administrative expenses |
|
|
344 |
|
|
|
2,988 |
|
|
|
2,375 |
|
|
|
8,503 |
|
| Total stock-based compensation |
|
$ |
480 |
|
|
$ |
3,101 |
|
|
$ |
3,011 |
|
|
$ |
9,150 |
|
|
| Schedule of estimation of fair value of stock-based compensation |
| |
|
Three months ended
September 30, |
|
Nine months ended
September 30, |
| |
|
2022 |
|
2021 |
|
2022 |
|
2021 |
| Dividend yield |
|
0% |
|
0% |
|
0% |
|
0% |
| Expected price volatility |
|
88.8% |
|
50.0% |
|
88.8% - 91.7% |
|
50.0% |
| Risk free interest rate |
|
3.96% |
|
0.66% - 1.12% |
|
3.96% - 3.25% |
|
0.22% - 1.12% |
| Expected term |
|
5.0 - 6.5 years |
|
6.0 - 7.0 years |
|
5.0 - 7.0 years |
|
3.0 - 7.0 years |
|
| Schedule of stock options |
| |
|
Shares Underlying
Options |
|
|
Weighted Average
Exercise
Price |
|
|
Weighted Average
Remaining Contractual
Term
(Years) |
|
|
Aggregate Intrinsic
Value |
|
| Outstanding at December 31, 2021 |
|
|
11,135,432 |
|
|
$ |
2.85 |
|
|
|
7.6 |
|
|
$ |
13,031 |
|
| Granted |
|
|
832,500 |
|
|
$ |
0.40 |
|
|
|
- |
|
|
|
|
|
| Canceled |
|
|
(652,776 |
) |
|
$ |
3.50 |
|
|
|
- |
|
|
|
|
|
| Forfeited |
|
|
(1,476,670 |
) |
|
$ |
2.60 |
|
|
|
- |
|
|
|
|
|
| Outstanding at September 30, 2022 |
|
|
9,838,486 |
|
|
$ |
2.63 |
|
|
|
6.9 |
|
|
$ |
53 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Exercisable at September 30, 2022 |
|
|
8,513,589 |
|
|
$ |
2.79 |
|
|
|
6.5 |
|
|
$ |
53 |
|
|
| Schedule of restricted stock unit |
| |
|
Number of
Shares |
|
|
Weighted
Average
Grant-Date
Fair Value |
|
| Unvested at December 31, 2021 |
|
|
1,939,683 |
|
|
$ |
3.40 |
|
| Granted |
|
|
576,350 |
|
|
$ |
0.62 |
|
| Vested |
|
|
(566,666 |
) |
|
$ |
2.81 |
|
| Issued |
|
|
(1,061,905 |
) |
|
$ |
4.50 |
|
| Unvested at September 30, 2022 |
|
|
887,462 |
|
|
$ |
2.30 |
|
|
| Schedule of warrant activity |
| |
|
Shares
Underlying
Warrants |
|
|
Weighted
Average
Exercise Price |
|
|
Weighted
Average
Remaining
Contractual
Term
(Years) |
|
|
Aggregate
Intrinsic
Value |
|
| Outstanding at December 31, 2021 |
|
|
4,525,177 |
|
|
$ |
2.65 |
|
|
|
4.0 |
|
|
$ |
7,088 |
|
| Issued |
|
|
1,376,602 |
|
|
$ |
1.26 |
|
|
|
|
|
|
|
|
|
| Outstanding at September 30, 2022 |
|
|
5,901,779 |
|
|
$ |
2.32 |
|
|
|
3.6 |
|
|
$ |
- |
|
|
| Schedule of estimated the fair value of the warrants |
| |
|
Three months ended
September 30, |
|
Nine months ended
September 30, |
| |
|
2022 |
|
2021 |
|
2022 |
|
2021 |
| Expected price volatility |
|
87.3%-87.5% |
|
50.0% |
|
87.3%-103.0% |
|
50.0% |
| Risk free interest rate |
|
2.9%-3.0% |
|
0.8%-1.0% |
|
2.2%-3.0% |
|
0.4%-1.0% |
| Expected term (years) |
|
5.0 |
|
5.0 |
|
5.0 |
|
5.0 |
|