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Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Stock issuance costs   $ 3,083
Convertible Preferred Shares    
Temporary equity, issuance costs $ 1,208 0
Temporary equity, settlement of convertible preferred stock liability   $ 6,673