The Company had reserved common shares for future issuances as follows: | | | | | | | | | | | | March 31,
2020 | | December 31,
2019 | Warrants to purchase shares | 5,500 |
| | 5,500 |
| Options to purchase shares | 1,781,431 |
| | 1,837,576 |
| Remaining shares available under the 2018 Equity Incentive Plan | 2,015,070 |
| | 1,312,648 |
| Shares issuable on vesting of restricted stock awards | 108,472 |
| | 128,682 |
| Remaining shares available under the 2018 ESPP | 474,000 |
| | 287,000 |
| Total | 4,384,473 |
| | 3,571,406 |
| | | | |
|