Debt - Components of carrying value of debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Long-term debt
Principal loan balance	$ 40,000	$ 40,000
Final Payment Fee	782	661
Debt issuance costs, net of accretion	(659)	(575)
Long-term debt, net of discount	$ 40,123	$ 40,086

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant