Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Total Amounts of Unrecognized Tax Benefits (Details)

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Income Taxes - Reconciliation of Total Amounts of Unrecognized Tax Benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]    
Unrecognized tax benefits, beginning of the year $ 732 $ 532
Gross increases in tax positions from prior periods 620 200
Unrecognized tax benefits, end of year $ 1,352 $ 732