Subsequent events - Follow-On Public Offering (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Feb. 16, 2024	Dec. 31, 2023
Subsequent events
Proceeds from exercise of common stock warrants		$ 34
Subsequent events | Public offering
Subsequent events
Sale of common stock	11,500,000
Price per share	$ 20.00
Proceeds from exercise of common stock warrants	$ 230,000