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Related Party Transactions (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
1 Months Ended 12 Months Ended
Mar. 31, 2021
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
Mar. 06, 2019
Feb. 06, 2019
Related Party Transaction [Line Items]            
Options to purchase shares (in shares)   2,041        
Exercise price per share (in dollars per share)   $ 0.10        
Chief Financial Officer            
Related Party Transaction [Line Items]            
Loan receivable         $ 0.2 $ 0.2
Immediate Family Member of Chief Executive Officer, Co-Founder, Chairman            
Related Party Transaction [Line Items]            
Related party payments     $ 0.2 $ 0.2    
Chief Executive Officer            
Related Party Transaction [Line Items]            
Related party expenses   $ 1.1        
Class A Common Stock | Immediate Family Member of Chief Executive Officer, Co-Founder, Chairman            
Related Party Transaction [Line Items]            
Options to purchase shares (in shares) 7          
Exercise price per share (in dollars per share) $ 0.10          
Aggregate estimated fair value of options granted $ 0.4