Face (par) amount of debt instrument at time of issuance.

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

Convertible Notes - Narrative (Details) $ in Thousands, £ in Millions		12 Months Ended
	Apr. 17, 2020 USD ($) shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($) shares	Apr. 17, 2020 GBP (£)
Debt Instrument, Redemption [Line Items]
Change in fair value of convertible notes \| $		$ 0	$ 0	$ (1,771)
Convertible B preferred stock
Debt Instrument, Redemption [Line Items]
Conversion of notes into B convertible preferred shares (in shares) \| shares	1,723,263			1,723,263
Convertible Debt
Debt Instrument, Redemption [Line Items]
Convertible notes, face amount	$ 18,400				£ 15.0