Common Stock Warrants - Summary of warrants (Details) |
9 Months Ended |
---|---|
Sep. 30, 2021
shares
| |
Common Stock Warrants | |
Warrants outstanding at December 31, 2020 | 4,407,962 |
Warrants issued | 0 |
Warrants exercised | 0 |
Warrants outstanding at September 30, 2021 | 4,407,962 |