Common stock - Narrative (Details) $ / shares in Units, $ in Millions |
1 Months Ended | 12 Months Ended | |
|---|---|---|---|
|
Feb. 28, 2022
USD ($)
$ / shares
shares
|
Sep. 30, 2022
vote
$ / shares
|
Sep. 30, 2021
$ / shares
|
|
| Class of Warrant or Right [Line Items] | |||
| Common stock, par value (in dollars per share) | $ / shares | $ 0.00001 | $ 0.00001 | |
| Number of votes per share | vote | 1 | ||
| Subsequent Public Offering | |||
| Class of Warrant or Right [Line Items] | |||
| Underwritten public offering (in shares) | shares | 5,227,272 | ||
| Common stock (in dollars per share) | $ / shares | $ 55.00 | ||
| Over-Allotment Option | |||
| Class of Warrant or Right [Line Items] | |||
| Underwritten public offering (in shares) | shares | 681,818 | ||
| Net proceeds from offering | $ | $ 269.8 |