Stockholders' equity - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) vote shares	Mar. 31, 2023 USD ($) 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	$ 5,846	$ 21,730
Number of shares reserved for future issuance (in shares) | shares	17,996,810			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	$ 20,200
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	3,278,707
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