Convertible Loans (Details) $ in Thousands, £ in Millions	1 Months Ended			3 Months Ended
	Dec. 31, 2020 USD ($)	Nov. 30, 2020 USD ($)	Jul. 31, 2020 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Nov. 18, 2021 shares	Jul. 31, 2020 GBP (£)
Debt
Proceeds from issuance of convertible loans				$ 0	$ 16,115
Debt instrument redemption premium percentage of outstanding principal amount			100.00%
Loss on issuance of convertible loan notes				0	33,301
Loss in fair value of derivative liability				0	56,902
Accretion expense					800
Equity Financing
Debt
Percentage of lowest price per share paid by investor			60.00%
Convertible Debt
Debt
Debt instrument, interest rate (as a percent)							8.00%
Percentage of lowest price per share paid by investor			60.00%
Debt instrument, valuation cap | £							£ 206.5
Convertible Debt | Qualified Financing
Debt
Percentage of lowest price per share paid by investor			60.00%
Class of warrant or right, number of securities called by warrants or rights (in shares) | shares						10,460,460
Convertible Debt | Non Qualified Financing
Debt
Percentage of lowest price per share paid by investor			60.00%
Convertible Loan Agreement | Convertible Debt
Debt
Proceeds from issuance of convertible loans	$ 14,100	$ 100	$ 12,600		$ 16,200
January 2021 Convertible Loan Agreement | Convertible Debt
Debt
Beneficial conversion feature				19,600
Derivative liability, fair value, gross liability				28,700
Debt instrument, unamortized discount				1,000
Derivative fair value compared to underlying liability				33,300
Convertible loans				0
Loss on issuance of convertible loan notes				$ 33,300