| Stock option activity |
| |
|
|
|
Options Outstanding |
| |
|
Options Available |
|
Number of Options |
|
Weighted-Average Exercise Price |
| Balances at January 1, 2018 |
|
941,408 |
|
658,592 |
|
$ 0.94 |
| Granted(1) |
|
(487,304) |
|
487,304 |
|
6.00 |
| Forfeited(2) |
|
40,000 |
|
(40,000) |
|
6.00 |
| Exercised |
|
— |
|
— |
|
— |
| Balances at December 31, 2018 |
|
494,104 |
|
1,105,896 |
|
2.99 |
| Granted |
|
— |
|
— |
|
— |
| Forfeited |
|
— |
|
— |
|
— |
| Exercised |
|
— |
|
— |
|
— |
| Balances at September 30, 2019 |
|
494,104 |
|
1,105,896 |
|
2.99 |
|
| |
|
|
|
|
|
|
Options Outstanding |
|
|
|
|
|
| |
|
|
Options Available |
|
|
|
Number of Options |
|
|
|
Weighted-Average Exercise Price |
|
| Balances at January 1, 2017 |
|
|
420,000 |
|
|
|
280,000 |
|
|
$ |
0.001 |
|
| Board-approved increase in option pool(1) |
|
|
900,000 |
|
|
|
— |
|
|
|
— |
|
| Granted (2) |
|
|
(378,592 |
) |
|
|
378,592 |
|
|
|
1.63 |
|
| Forfeited |
|
|
— |
|
|
|
— |
|
|
|
— |
|
| Exercised |
|
|
— |
|
|
|
— |
|
|
|
— |
|
| Balances at December 31, 2017 |
|
|
941,408 |
|
|
|
658,592 |
|
|
|
0.94 |
|
| Granted(3) |
|
|
(487,304 |
) |
|
|
487,304 |
|
|
|
6.00 |
|
| Forfeited(4) |
|
|
40,000 |
|
|
|
(40,000 |
) |
|
|
6.00 |
|
| Exercised |
|
|
— |
|
|
|
— |
|
|
|
— |
|
| Balances at December 31, 2018 |
|
|
494,104 |
|
|
|
1,105,896 |
|
|
|
2.99 |
|
|
| Summary of options outstanding |
| Exercise Prices |
|
Number of Shares subject to Options Outstanding |
|
Weighted Average Remaining Contractual Term |
|
Number of Shares Subject to Options Fully Vested and Exercisable |
|
Weighted Average Remaining Contractual Term |
| $0.001 |
|
555,520 |
|
7.0 years |
|
457,940 |
|
6.9 years |
| 6.00 |
|
550,376 |
|
8.8 years |
|
232,341 |
|
8.7 years |
| |
|
1,105,896 |
|
|
|
690,281 |
|
|
|
| Exercise Prices |
|
|
|
Numberof Shares Outstanding |
|
Weighted Average Remaining Contractual Term |
|
Number of Shares Fully Vested and Exercisable |
|
Weighted Average Remaining Contractual Term |
| $ |
0.001 |
|
|
|
|
|
|
|
555,520 |
|
|
|
7.7 years |
|
|
|
406,280 |
|
|
7.6 years |
| $ |
6.00 |
|
|
|
|
|
|
|
550,376 |
|
|
|
9.5 years |
|
|
|
58,910 |
|
|
8.9 years |
| |
|
|
|
|
|
|
|
|
1,105,896 |
|
|
|
|
|
|
|
465,190 |
|
|