Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets:
Net operating loss carryforwards	$ 155,088	$ 74,417	$ 39,489
Tax credit carryforwards	18,769	9,833	4,879
Lease liability	797	1,116	1,320
Other	2,479	631	225
Stock-based compensation	8,887	264	0
Gross deferred tax assets	186,020	86,261	45,913
Valuation allowance	(184,892)	(84,852)	(43,985)
Net deferred tax assets	1,128	1,409	1,928
Deferred tax liabilities:
Property, plant and equipment	395	352	438
Intangible assets	0	0	10
Capital lease assets	733	1,057	1,480
Net deferred tax liabilities	1,128	1,409	1,928
Net deferred tax asset/(liability)	$ 0	$ 0	$ 0