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Equity - Narrative (Details)
$ / shares in Units, $ in Thousands
1 Months Ended 5 Months Ended 12 Months Ended
Oct. 28, 2022
USD ($)
Jun. 08, 2021
vote
$ / shares
shares
Oct. 31, 2021
USD ($)
$ / shares
shares
Jun. 30, 2021
$ / shares
shares
Mar. 31, 2018
$ / shares
shares
Apr. 30, 2010
Mar. 31, 2023
USD ($)
$ / shares
shares
Sep. 30, 2022
USD ($)
shares
Mar. 31, 2023
USD ($)
$ / shares
shares
Mar. 31, 2022
USD ($)
$ / shares
shares
Mar. 31, 2021
USD ($)
$ / shares
Mar. 31, 2018
shares
May 12, 2022
USD ($)
Mar. 31, 2017
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Preferred stock, authorized (in shares)       100,000,000     100,000,000   100,000,000 100,000,000        
Preferred stock, par value (in dollars per share) | $ / shares       $ 0.001     $ 0.001   $ 0.001 $ 0.001        
Preferred stock, issued (in shares)             0   0 0        
Preferred stock, outstanding (in shares)             0   0 0        
Common stock, authorized (in shares)             1,500,000,000   1,500,000,000 1,500,000,000        
Common stock, par value (in dollars per share) | $ / shares             $ 0.001   $ 0.001 $ 0.001        
Conversion of stock conversion ratio       1                    
Common stock, outstanding (in shares)             193,941,000   193,941,000 192,398,000        
Stock repurchase program, authorized amount | $ $ 70,000                       $ 70,000  
Repurchase and retirement of common stock (in shares)             523,647 2,150,982            
Stock repurchase program, period in force 12 months                          
Repurchase and retirement of common stock | $             $ 16,000 $ 70,000 $ 86,072 $ 2,698 $ 2,022      
Stock repurchase program, remaining authorized repurchase amount | $             $ 54,000   $ 54,000          
Common stock warrants (in shares)             641,000   641,000          
Stock based compensation expense | $                 $ 47,834 $ 31,442 7,252      
Unamortized compensation expense, weighted average period of recognition                 2 years 11 months 1 day          
Number of shares reserved for future issuance (in shares)             62,560,000   62,560,000          
Options outstanding (in shares)             22,407,000   22,407,000 26,983,000        
Aggregate intrinsic value of options | $                 $ 118,400 $ 521,600 $ 52,600      
Weighted-average grant-date fair value of options granted (in dollars per share) | $ / shares                   $ 10.73 $ 3.18      
Unamortized compensation expense, option | $             $ 37,000   $ 37,000          
Stock options                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Award vesting period                 4 years          
Expiration period from the date of grant                 10 years          
Restricted Stock Units (RSUs)                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Unamortized compensation expense excluding option | $             59,300   $ 59,300          
Unamortized compensation expense, weighted average period of recognition                 3 years 14 days          
Award vesting period                 4 years          
Total fair value of vested equity instruments | $                 $ 11,400 $ 2,500        
Vested (in shares)                 324,000          
Performance Shares                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock based compensation expense | $                 $ 0 $ 1,700 $ 0      
Unamortized compensation expense, option | $             $ 0   $ 0          
Options unvested (in shares)             0   0 480,000        
Options vested (in shares)                 200,000          
Options forfeited (in shares)                 280,000          
Performance Shares | Chief Executive Officer                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Stock based compensation expense | $                 $ 200 $ 1,700        
Options granted (in shares)         1,792,000                  
Options granted, exercise price (in dollars per share) | $ / shares         $ 0.97                  
Performance-Based Restricted Stock Units                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Unamortized compensation expense excluding option | $             $ 3,000   $ 3,000          
Unamortized compensation expense, weighted average period of recognition                 9 months 3 days          
Total fair value of vested equity instruments | $                 $ 400          
Vested (in shares)                 11,000 0        
2010 Plan                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Options outstanding (in shares)             19,752,000   19,752,000          
2010 Plan | Individuals With Voting Interest Less Than Threshold                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Grant exercise price, percentage of estimated fair value of common stock on date of grant (not less than)           100.00%                
2010 Plan | Individuals With Voting Interest At Threshold                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Grant exercise price, percentage of estimated fair value of common stock on date of grant (not less than)           110.00%                
Voting interests threshold           10.00%                
2010 Plan | Stock options                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Award vesting period           4 years                
Expiration period from the date of grant           10 years                
2021 Plan                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Number of shares reserved for future issuance (in shares)       22,500,000                    
Maximum annual increase of shares reserved for future issuance as a percentage of common stock outstanding       5.00%                    
2021 ESPP                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Number of shares reserved for future issuance (in shares)             4,500,000   4,500,000          
Maximum annual increase of shares reserved for future issuance as a percentage of common stock outstanding             1.00%   1.00%          
Maximum annual increase of shares reserved for future issuance (in shares)             6,750,000   6,750,000          
Options outstanding outside the Plans                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Options granted (in shares)                       4,682,582    
Options exercised (in shares)             2,027,917   2,027,917          
Options outstanding (in shares)             2,654,665   2,654,665          
Contract With U.S. News & World Report, L.P.                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Common stock warrants (in shares)                           250,000
Exercise price called by warrants (in dollars per share) | $ / shares                           $ 0.72
Warrants and rights outstanding, term                           10 years
Warrants exercised in period (in shares)                 125,000          
Warrants exercised in period , intrinsic value | $                 $ 4,000          
Warrant outstanding (in shares)             125,000   125,000          
U.S. News Warrant                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Common stock warrants (in shares)     516,000                      
Exercise price called by warrants (in dollars per share) | $ / shares     $ 12.56                      
Warrants and rights outstanding, term     10 years                      
Warrants and rights outstanding, vesting period     6 years 5 months 23 days                      
Warrants and rights outstanding | $     $ 34,700                      
Stock based compensation expense | $                 $ 5,400 $ 2,600        
Unamortized compensation expense excluding option | $             $ 26,800   $ 26,800          
Unamortized compensation expense, weighted average period of recognition                 5 years          
U.S. News Warrant | Share-Based Payment Arrangement, Subsequent to Tranche One                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrants and rights outstanding, vesting period     6 years                      
U.S. News Warrant | Measurement Input, Share Price                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrant, measurement input     76.50                      
U.S. News Warrant | Measurement Input, Price Volatility                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrant, measurement input     0.469                      
U.S. News Warrant | Measurement Input, Risk Free Interest Rate                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrant, measurement input     0.0161                      
U.S. News Warrant | Measurement Input, Expected Term                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrants and rights outstanding, term     10 years                      
U.S. News Warrant | Measurement Input, Expected Dividend Rate                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Warrant, measurement input     0                      
Common Stock                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Conversion of stock (in shares)   85,523,836                        
Common Class A                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Common stock, authorized (in shares)   1,000,000,000                        
Common stock, par value (in dollars per share) | $ / shares   $ 0.001                        
Common stock, number of votes per share | vote   1                        
Common stock, outstanding (in shares)             120,682,472   120,682,472          
Common Class B                            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
Common stock, authorized (in shares)   500,000,000                        
Common stock, par value (in dollars per share) | $ / shares   $ 0.001                        
Common stock, number of votes per share | vote   10                        
Conversion of stock conversion ratio   1                        
Common stock, outstanding (in shares)             73,258,344   73,258,344