Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (Parenthetical)

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CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (DEFICIT) (Parenthetical) - Common Stock - USD ($)
$ in Thousands
 12 Months Ended
May 22, 2019
Dec. 31, 2019
Dec. 31, 2018
Issuance costs   $ 30 $ 831
IPO      
Issuance costs $ 4,861 $ 8,000