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Convertible Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Aug. 15, 2018
Jul. 13, 2018
Class of Stock [Line Items]        
Preferred stock, value issued $ 0 $ 399,589    
Preferred stock, shares issued (in shares) 0      
Preferred stock, liquidation preference per share (in dollars per share) $ 3.67      
Preferred stock, shares outstanding (in shares) 0      
Conversion of Preferred Stock to Common stock Trigger        
Class of Stock [Line Items]        
Threshold minimum proceeds from issuance of common stock trigger for conversion of preferred stock $ 75,000      
Series A Preferred Stock | Restated Certificate of Incorporation        
Class of Stock [Line Items]        
Preferred stock, shares authorized (in shares) 109,090,908      
Preferred stock, par or stated value per share (in dollars per share) $ 0.00003      
Series A Convertible Preferred Stock        
Class of Stock [Line Items]        
Preferred stock, convertible conversion price (in dollars per share) $ 3.67      
KKR Denali        
Class of Stock [Line Items]        
Preferred stock, value issued       $ 400,000
KKR Denali | Series A Preferred Stock        
Class of Stock [Line Items]        
Preferred stock, shares issued (in shares)     109,090,908