Annual report pursuant to Section 13 and 15(d)

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

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CONSOLIDATED STATEMENTS OF CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS' EQUITY (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Private Placement | Pre-Funded Warrant      
Issuance costs $ 401    
Common Stock | Incyte      
Issuance costs     $ 100
Common Stock | Convertible Preferred Stock      
Conversion ratio of series A stock into common stock   1000.00%  
Common Stock | At The Market      
Issuance costs $ 411   107
Common Stock | Follow On Offering      
Issuance costs   $ 4,600 $ 3,300
Series A Convertible Preferred Stock      
Issuance costs   $ 400