Common stock (Details)		1 Months Ended		12 Months Ended
	Jan. 15, 2023 shares	Jun. 30, 2023 USD ($) shares	Jan. 31, 2023 USD ($) shares	Dec. 31, 2023 USD ($) Vote	Oct. 01, 2021 USD ($)
Common stock voting right | Vote				1
Payment of offering costs				$ 8,997,000
Proceeds from issuance of common stock				$ 34,000
Subscription Agreements
Stock issued | shares		21,690,871
Payment of offering costs		$ 9,000,000.0
Proceeds from issuance of common stock		$ 125,000,000.0
2020 Plan | Non-employee
Shares issued | shares	55,250
Shelf Registration Statement | Maximum
Securities aggregate price					$ 200,000,000.0
Open Market Sale
Stock issued | shares			5,925
Proceeds from issuance of common stock			$ 34,000
Open Market Sale | Maximum
Securities aggregate price					$ 75,000,000.0