Annual report pursuant to Section 13 and 15(d)

Income Taxes - Unrecognized Tax Benefits (Details)

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Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
Gross amount of unrecognized tax benefits as of the beginning of the year $ 2,811 $ 2,184 $ 1,794
Additions based on tax positions related to a prior year 853 0 61
Additions based on tax positions related to the current year 2,154 627 329
Reductions based on tax positions related to a prior year (32) 0 0
Gross amount of unrecognized tax benefits as of the end of the year $ 5,786 $ 2,811 $ 2,184