Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Common Stock    
Stock issuance costs $ 0.7 $ 2.6
Series A Redeemable Convertible Preferred Stock    
Stock issuance costs   0.1
Series B Redeemable Convertible Preferred Stock Member    
Stock issuance costs   $ 0.4