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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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