v3.20.1
Equity Transactions (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Jun. 14, 2019
unit_Standard_Vote
$ / shares
shares
Jan. 31, 2020
USD ($)
$ / shares
shares
Jan. 31, 2019
$ / shares
shares
Class of Stock [Line Items]      
Common stock shares authorized (in shares) | shares   0 220,000,000
Common stock par value (in usd per share) | $ / shares   $ 0.0005 $ 0.0005
Preferred stock, shares authorized (in shares) | shares   100,000,000 0
Preferred stock par value (in usd per share) | $ / shares   $ 0.0005 $ 0.0005
Payments for Legal Settlements | $   $ 2.3  
IPO      
Class of Stock [Line Items]      
Preferred stock, shares authorized (in shares) | shares 100,000,000    
Preferred stock par value (in usd per share) | $ / shares $ 0.0005    
Class A Common Stock      
Class of Stock [Line Items]      
Common stock shares authorized (in shares) | shares   2,000,000,000 0
Common stock par value (in usd per share) | $ / shares   $ 0.0005 $ 0.0005
Class A Common Stock | IPO      
Class of Stock [Line Items]      
Common stock shares authorized (in shares) | shares 2,000,000,000    
Common stock par value (in usd per share) | $ / shares $ 0.0005    
Number of votes per share | unit_Standard_Vote 1    
Common stock conversion ratio 1    
Class B Common Stock      
Class of Stock [Line Items]      
Common stock shares authorized (in shares) | shares   300,000,000 0
Common stock par value (in usd per share) | $ / shares   $ 0.0005 $ 0.0005
Class B Common Stock | IPO      
Class of Stock [Line Items]      
Common stock shares authorized (in shares) | shares 300,000,000    
Common stock par value (in usd per share) | $ / shares $ 0.0005    
Number of votes per share | unit_Standard_Vote 10    
Common stock conversion ratio 1