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Common stock - Public Offering of Common Stock (Details) - September 2021 - USD ($) | Sep. 24, 2021 | Sep. 30, 2022
--- | --- | ---
Warrant to purchase shares of common stock | 8,771,928 |
Exercise price of warrant | $ 0.001 | $ 0.001
Common Stock |  |
Common stock issued | 22,828,072 |
Issue price | $ 2.85 |
Net proceeds from issuance of common stock | $ 96,828 |
Underwriters' exercise | Common Stock |  |
Common stock issued | 4,740,000 |

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