Income taxes	9 Months Ended
	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income taxes	Income taxesAs of December 31, 2022, the Company recorded no income tax provision or benefit due to losses generated in the U.S. where no benefit was recorded due to the valuation allowance. The Company continues to maintain a full valuation allowance for its U.S. federal and state deferred tax assets as of September 30, 2023. The Company’s effective tax rate in the nine months ended September 30, 2023 was impacted by the Chinese withholding tax obligation related to the upfront payment received in connection with the Betta License Agreement, as described in Note 8, Collaboration and license agreement, to the unaudited condensed consolidated financial statements included elsewhere in this Quarterly Report on Form 10-Q, which resulted in a tax provision of $1.0 million and an effective tax rate of (1.0)%.