Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Loss Before Income Taxes

	Year Ended December 31,
	2021		2020
			(As Restated)(1)
Foreign (United States)	$	1,186	$	(401)
Foreign (Other)		(23,191)		(3)
United Kingdom		(195,416)		(59,874)
Total	$	(217,421)	$	(60,278)

Schedule of Components of Income Tax Expense (Benefit)

	Year Ended December 31,
	2021		2020
Current Provision:
United Kingdom	$	—	$	—
Foreign (United States)		357		—
Foreign (Other)		—		—
Total	$	357	$	—
Deferred Provision (Benefit):
United Kingdom	$	—	$	—
Foreign (United States)		—		—
Foreign (Other)		—		—
Total	$	—	$	—
Total Provision (Benefit) for Income Taxes	$	357	$	—

Schedule of Effective Income Tax Rate Reconciliation

	Year Ended December 31,
	2021		2020
			(As Restated)(1)
Income taxes at UK statutory rate	19.0	%	19.0	%
Permanent differences	(7.0)	%	(6.6)	%
Foreign Rate Differential	(2.0)	%	—	%
Impact of tax rate change	5.9	%	—	%
Deferred true-up	(1.9)	%	—	%
Change in valuation allowance	(14.3)	%	(12.4)	%
Others	0.2	%	—	%
Effective income tax rate	(0.2)	%	—	%

Schedule of Deferred Tax Assets and Liabilities

Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2021 and 2020 consist of the following (in thousands):

	Year Ended December 31,
	2021		2020
Deferred Tax Assets:
Net operating loss carryforwards	$	55,862	$	25,105
Others		437		—
Net Deferred Tax Assets		56,299		25,105
Valuation allowance		(55,261)		(22,511)
Net Deferred Tax Asset		1,038		2,594
Deferred Tax Liabilities
Depreciation		(194)		(86)
Amortization		(40)		(201)
Debt discount		—		(1,747)
Cash to Accrual - Section 481(a) Adjustment(1)		(804)		—
Others		—		(560)
Net Deferred Tax Liability		(1,038)		(2,594)
Net Deferred Tax Assets (liability)	$	—	$	—

(1) Note in 2020 the accrual to cash adjustment was included as part of “other” category.

Schedule of Valuation Allowance

Changes in the valuation allowance for deferred tax assets during the years ended December 31, 2021 and 2020 related primarily to the increases in net operating loss carryforwards and research and development tax credit carryforwards and were as follows (in thousands):

	Year Ended December 31,
	2021		2020
Valuation allowance at beginning of year	$	22,511	$	16,797
Increases recorded to income tax provision		31,003		7,461
Increase (decrease) recorded to APIC		1,747		(1,747)
Valuation allowance at end of year	$	55,261	$	22,511