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Income Taxes - Summary of Loss from Continuing Operations Before Taxes on Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Income Tax Disclosure [Line Items] |  |
Net loss before income tax | $ (49,558) | $ (57,202)
United States |  |
Income Tax Disclosure [Line Items] |  |
Net loss before income tax | (58,760) | (19,502)
Lithuania |  |
Income Tax Disclosure [Line Items] |  |
Net loss before income tax | (73) | 200
Israel |  |
Income Tax Disclosure [Line Items] |  |
Net loss before income tax | $ 9,275 | $ (37,900)

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