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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Restricted cash   $ 51 $ 1,381  
Deferred offering costs reclassified to additional-paid-in capital $ 4,300      
Deferred offering costs payable   0 0  
Long-lived asset impairment charges   0 0 $ 0
Advertising expense   102,900 $ 62,000 $ 33,000
Implementation cost capitalized, additions   1,100    
Implementation costs, amortization expense   $ 187    
Capitalized internal-use software        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Estimated useful life   3 years    
Adjustment | ASU 2018-15        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Implementation cost capitalized, additions   $ 1,100    
Implementation costs, amortization expense   $ 200