Related parties (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2020 |
Jun. 30, 2019 |
|
| Series D Preferred Stock | ||||
| Related parties | ||||
| Preferred shares issued | 50,670 | |||
| Proceeds from common stock issued | $ 7.4 | |||
| Common stock | ||||
| Related parties | ||||
| Shares issued | 1,303,750 | |||
| Proceeds from shares issued | $ 18.3 | |||
| University of Basel | ||||
| Related parties | ||||
| Research and development expenses | $ 0.0 | $ 0.3 | 0.3 | |
| Royalties paid | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 |
| University of Basel | Maximum | ||||
| Related parties | ||||
| Research and development expenses | $ 0.1 | |||