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Statements of Comprehensive Loss - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]      
Net Loss $ (100,077) $ (89,217) $ (50,274)
Other comprehensive loss:      
Unrealized losses on investments (241)    
Comprehensive Loss $ (100,318) $ (89,217) $ (50,274)