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Income Taxes - Summary of Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Line Items]
Research and development expenses	$ 5,392	$ 3,419
Accrued expenses	635	349
Other	658	10
Total deferred tax assets	22,005	10,022
Less: valuation allowance	(21,936)	(10,022)
Net deferred tax assets	69
United States
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	11,342	1,916
Israel
Income Tax Disclosure [Line Items]
Net operating loss carryforwards	$ 3,978	$ 4,328

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