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Warrants - Narrative (Details)	12 Months Ended
	Dec. 31, 2023 shares	Dec. 31, 2022 £ / shares shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2017 £ / shares shares
Other Liabilities Disclosure [Abstract]
Number of warrants exercised and forfeited	0	0
Stock warrants (in shares)			12,401,262	31,115,926
Issue price of warrants (in pounds sterling per share) | £ / shares				£ 1.4365
Number of shares called by each warrant				0.4
Exercise price of stock warrant (in pound sterling per share) | £ / shares		£ 1.7238		£ 1.7238
Number of outstanding warrants			31,003,155
Intrinsic value | $			$ 0

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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-URI https://asc.fasb.org//1943274/2147481112/505-10-50-3

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