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Stockholders' equity - Narrative (Details) $ in Thousands | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2023 USD ($) shares | Sep. 30, 2024 USD ($) vote shares | Sep. 30, 2023 USD ($) shares | Feb. 29, 2024 USD ($) | Dec. 31, 2023 shares | Nov. 30, 2022 USD ($) | Feb. 28, 2022 USD ($)
Class of Stock [Line Items] |  |  |  |  |  |  |
Preferred stock, shares authorized (in shares) | shares |  | 25,000,000 |  |  | 25,000,000 |  |
Preferred stock, shares issued (in shares) | shares |  | 0 |  |  | 0 |  |
Net proceeds from public offering of common stock |  | $ 5,780 | $ 93,539 |  |  |  |
Number of shares reserved for future issuance (in shares) | shares |  | 17,274,942 |  |  | 14,736,953 |  |
Common Stock |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of votes per common share | vote |  | 1 |  |  |  |  |
At-the-market Equity Offering Program (February 2022 ATM) |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Amount of shares authorized to be offered and sold |  |  |  |  |  |  | $ 100,000
Net proceeds from public offering of common stock | $ 1,600 |  |  |  |  |  |
At-the-market Equity Offering Program (February 2022 ATM) | Common Stock |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Issuance of common stock from at-the-market transactions, net of issuance costs (in shares) | shares | 256,386 |  |  |  |  |  |
At-the-market Equity Offering Program (November 2022 ATM) |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Amount of shares authorized to be offered and sold |  |  |  |  |  | $ 150,000 |
Net proceeds from public offering of common stock |  | $ 5,800 | $ 92,200 |  |  |  |
At-the-market Equity Offering Program (November 2022 ATM) | Common Stock |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Issuance of common stock from at-the-market transactions, net of issuance costs (in shares) | shares |  | 1,041,201 | 14,208,145 |  |  |  |
Remaining unsold and available amount |  | $ 50,000 |  |  |  |  |
At Market Equity Offering Program (February 2024 ATM) |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Amount of shares authorized to be offered and sold |  |  |  | $ 100,000 |  |  |
At Market Equity Offering Program (February 2024 ATM) | Common Stock |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Remaining unsold and available amount |  | $ 100,000 |  |  |  |  |

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