| Stock Option Plan Activity |
Activity under the Company’s stock option plans is set forth below:
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Options |
|
Weighted-Average
Exercise Price |
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Weighted-Average
Remaining
Contractual Term
in years |
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(In thousands) |
|
(Per Share Data) |
|
(Years) |
Outstanding as of December 31, 2019
|
5,947 |
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$ |
1.23 |
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8.1 |
| Granted |
18,528 |
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$ |
0.22 |
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| Exercised |
(50) |
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$ |
0.80 |
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| Forfeited or expired |
(1,971) |
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$ |
0.80 |
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Outstanding as of June 30, 2020
|
22,454 |
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$ |
0.32 |
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9.5 |
Options vested and expected to vest as of June 30, 2020 |
22,454 |
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$ |
0.32 |
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Vested and exercisable as of June 30, 2020 |
2,613 |
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$ |
0.83 |
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Outstanding as of December 31, 2020
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26,347 |
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$ |
0.27 |
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9.3 |
| Granted |
1,186 |
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$ |
5.40 |
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| Exercised |
(203) |
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$ |
1.40 |
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| Forfeited or expired |
(332) |
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$ |
0.33 |
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Outstanding as of June 30, 2021
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26,998 |
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$ |
0.48 |
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8.7 |
Options vested and expected to vest as of June 30, 2021 |
26,998 |
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$ |
0.48 |
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Vested and exercisable as of June 30, 2021 |
7,299 |
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$ |
0.51 |
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Activity under the Company’s stock option plans is set forth below:
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Options |
|
Weighted-Average
Exercise Price
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|
Weighted-Average
Remaining
Contractual Term
in years
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(In thousands) |
|
(Per Share Data) |
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(Years) |
Outstanding as of January 1, 2019
|
6,389 |
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$ |
1.50 |
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| Granted |
5,882 |
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$ |
0.80 |
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| Exercised |
(151) |
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$ |
1.05 |
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| Forfeited or expired |
(6,173) |
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$ |
1.39 |
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Outstanding as of December 31, 2019
|
5,947 |
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$ |
1.23 |
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8.1 |
| Granted |
25,675 |
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$ |
0.20 |
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| Exercised |
(67) |
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$ |
0.80 |
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| Forfeited or expired |
(5,208) |
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$ |
0.55 |
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Outstanding as of December 31, 2020
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26,347 |
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$ |
0.27 |
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9.3 |
Options vested and expected to vest as of December 31, 2020 |
26,347 |
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$ |
0.27 |
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Vested and exercisable as of December 31, 2020 |
3,309 |
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$ |
0.77 |
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| Weighted-Average Assumptions Used in Stock Options |
The weighted-average assumptions in the Black-Scholes option-pricing model used to determine the fair value of stock options granted were as follows:
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Six months ended June 30, |
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2021 |
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2020 |
| Expected volatility |
60% |
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60% |
| Risk-free interest rate |
0.9% – 1.0% |
|
0.4% – 0.8% |
| Dividend yield |
—% |
|
—% |
| Expected term (in years) |
5.71 |
|
6.07 |
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The weighted-average assumptions in the Black-Scholes option-pricing model used to determine the fair value of stock options granted were as follows:
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Year ended December 31, |
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2020 |
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2019 |
| Expected volatility |
60 |
% |
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60 |
% |
| Risk-free interest rate |
0.4% – 0.5% |
|
2.0% – 3.0% |
| Dividend yield |
— |
% |
|
— |
% |
| Expected term (in years) |
6.04 |
|
5.28 |
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| Schedule of Stock-Based Compensation Expense |
The following sets forth the total stock-based compensation expense for the stock options included in the statements of operations:
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Six months ended June 30, |
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2021 |
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2020 |
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(In thousands) |
| Research and development |
$ |
387 |
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$ |
382 |
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| Selling and marketing |
174 |
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|
213 |
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| General and administrative |
514 |
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|
182 |
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$ |
1,075 |
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$ |
777 |
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The following sets forth the total stock-based compensation expense for the stock options included in the statements of operations:
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Year ended December 31, |
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2020 |
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2019 |
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(In thousands) |
| Research and development |
$ |
728 |
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$ |
769 |
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| Selling and marketing |
373 |
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|
304 |
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| General and administrative |
354 |
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|
399 |
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$ |
1,455 |
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$ |
1,472 |
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