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Equity Compensation and Other Benefits - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 22, 2021
Dec. 31, 2021
Dec. 31, 2020
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Shares under ESPP (in shares)   1,273,009  
Number of additional shares authorized under ESPP (in shares)     276,792
Maximum percentage of employee earnings for contribution to ESPP   15.00%  
Purchase price of stock under ESPP   85.00%  
Weighted average fair value per share of options granted (in USD per share)   $ 12.11 $ 9.10
Capitalized compensation cost   $ 1,000 $ 1,000
Income tax expense (benefit) recognized for share-based compensation arrangements   $ (200) 2,600
401K match percentage   4.00%  
Amount contributed to 401k   $ 3,700 2,900
Total stock-based compensation (1)   $ 18,857 $ 19,488
Hello Digit, Inc.      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Number of shares issued (in shares) 3,522,182    
2019 Plan      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Number of shares authorized (in shares)   8,733,812  
Number of shares available for future awards (in shares)   1,576,892  
Percentage of additional shares authorized   0.05  
Increase in shares available for issuance (in shares)     1,383,963
2021 Inducement Plan      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Number of shares authorized (in shares)   655,000  
Number of shares available for future awards (in shares)   269,732  
Minimum      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Additional shares under ESPP as a percentage   0.01  
Number of additional shares authorized under ESPP (in shares)   726,186  
Stock options      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Expiration period   10 years  
Vesting period   4 years  
Unrecognized compensation cost   $ 6,900 $ 9,500
Unrecognized compensation cost, period for recognition   2 years 2 months 12 days 2 years 7 months 6 days
Restricted stock units      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Vesting period   4 years  
Quarterly vesting percentage   6.25%  
Unrecognized compensation cost, period for recognition   2 years 7 months 6 days 2 years 10 months 24 days
Unrecognized compensation cost   $ 54,100 $ 37,200
Granted (in shares)   1,837,662  
Restricted stock units | Hello Digit, Inc.      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Number of shares issued (in shares) 501,906    
Granted (in shares) 650,460    
Share-based Payment Arrangement, Tranche One | Stock options      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Annual vesting percentage   25.00%  
Share-based Payment Arrangement, Tranche One | Restricted stock units      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Annual vesting percentage   25.00%  
Share-based Payment Arrangement, Tranche One | Restricted stock units | Hello Digit, Inc.      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Vesting period 1 year    
Annual vesting percentage 50.00%    
Share-based Payment Arrangement, Tranche Two | Restricted stock units      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Annual vesting percentage   25.00%  
Share-based Payment Arrangement, Tranche Two | Restricted stock units | Hello Digit, Inc.      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Vesting period 2 years    
Annual vesting percentage 25.00%    
Share-based Payment Arrangement, Tranche Three | Restricted stock units      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Annual vesting percentage   25.00%  
Share-based Payment Arrangement, Tranche Three | Restricted stock units | Hello Digit, Inc.      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Annual vesting percentage 50.00%    
Share-based Payment Arrangement, Tranche Four | Restricted stock units      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Annual vesting percentage   25.00%  
Share-based Payment Arrangement, Tranche Four | Restricted stock units | Hello Digit, Inc.      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Vesting period 3 years    
Annual vesting percentage 16.667%    
Share-based Payment Arrangement, Tranche Five | Restricted stock units | Hello Digit, Inc.      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Vesting period 4 years    
Annual vesting percentage 12.50%