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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) - USD ($)
shares in Thousands, $ in Millions
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Loss
Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2022   75,120      
Beginning balance at Dec. 31, 2022 $ 341.7 $ 0.0 $ 427.3 $ (0.9) $ (84.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of Class A common stock upon exercise of stock options (in shares)   1,226      
Issuance of Class A common stock upon exercise of stock options 8.4   8.4    
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)   380      
Issuance of Class A common stock pursuant to settlement of restricted stock units 0.0        
Class A common stock withheld related to net share settlement of restricted stock units (in shares)   (15)      
Class A common stock withheld related to net share settlement of restricted stock units (0.3)   (0.3)    
Stock-based compensation 10.1   10.1    
Other comprehensive income (loss) 0.2     0.2  
Net income (loss) 1.7       1.7
Ending balance (in shares) at Mar. 31, 2023   76,711      
Ending balance at Mar. 31, 2023 361.8 $ 0.0 445.5 (0.7) (83.0)
Beginning balance (in shares) at Dec. 31, 2022   75,120      
Beginning balance at Dec. 31, 2022 341.7 $ 0.0 427.3 (0.9) (84.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss) (9.5)        
Ending balance (in shares) at Sep. 30, 2023   76,994      
Ending balance at Sep. 30, 2023 364.2 $ 0.0 471.2 (0.7) (106.3)
Beginning balance (in shares) at Mar. 31, 2023   76,711      
Beginning balance at Mar. 31, 2023 361.8 $ 0.0 445.5 (0.7) (83.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of Class A common stock upon exercise of stock options (in shares)   66      
Issuance of Class A common stock upon exercise of stock options 0.4   0.4    
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)   674      
Issuance of Class A common stock pursuant to settlement of restricted stock units 0.0        
Class A common stock withheld related to net share settlement of restricted stock units (in shares)   (25)      
Class A common stock withheld related to net share settlement of restricted stock units (0.2)   (0.2)    
Issuance of Class A common stock under Employee Stock Purchase Plan (in shares)   240      
Issuance of Class A common stock under Employee Stock Purchase Plan 1.9   1.9    
Repurchase of Class A common stock (in shares)   (141)      
Repurchase of Class A common stock (1.3)       (1.3)
Stock-based compensation 12.9   12.9    
Other comprehensive income (loss) 0.2     0.2  
Net income (loss) (10.7)       (10.7)
Ending balance (in shares) at Jun. 30, 2023   77,525      
Ending balance at Jun. 30, 2023 365.0 $ 0.0 460.5 (0.5) (95.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of Class A common stock upon exercise of stock options (in shares)   51      
Issuance of Class A common stock upon exercise of stock options 0.3   0.3    
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)   657      
Issuance of Class A common stock pursuant to settlement of restricted stock units 0.0        
Class A common stock withheld related to net share settlement of restricted stock units (in shares)   (30)      
Class A common stock withheld related to net share settlement of restricted stock units (0.2)   (0.2)    
Repurchase of Class A common stock (in shares)   (1,209)      
Repurchase of Class A common stock (10.8)       (10.8)
Stock-based compensation 10.6   10.6    
Other comprehensive income (loss) (0.2)     (0.2)  
Net income (loss) (0.5)       (0.5)
Ending balance (in shares) at Sep. 30, 2023   76,994      
Ending balance at Sep. 30, 2023 $ 364.2 $ 0.0 471.2 (0.7) (106.3)
Beginning balance (in shares) at Dec. 31, 2023 76,940 76,940      
Beginning balance at Dec. 31, 2023 $ 366.9 $ 0.0 483.7 (0.3) (116.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of Class A common stock upon exercise of stock options (in shares)   276      
Issuance of Class A common stock upon exercise of stock options 1.7   1.7    
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)   529      
Issuance of Class A common stock pursuant to settlement of restricted stock units 0.0        
Class A common stock withheld related to net share settlement of restricted stock units (in shares)   (25)      
Class A common stock withheld related to net share settlement of restricted stock units (0.5)   (0.5)    
Stock-based compensation 9.6   9.6    
Other comprehensive income (loss) (0.1)     (0.1)  
Net income (loss) 1.1       1.1
Ending balance (in shares) at Mar. 31, 2024   77,720      
Ending balance at Mar. 31, 2024 $ 378.7 $ 0.0 494.5 (0.4) (115.4)
Beginning balance (in shares) at Dec. 31, 2023 76,940 76,940      
Beginning balance at Dec. 31, 2023 $ 366.9 $ 0.0 483.7 (0.3) (116.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of Class A common stock upon exercise of stock options (in shares) 810        
Net income (loss) $ (8.2)        
Ending balance (in shares) at Sep. 30, 2024 74,028 74,028      
Ending balance at Sep. 30, 2024 $ 322.4 $ 0.0 519.3 0.0 (196.9)
Beginning balance (in shares) at Mar. 31, 2024   77,720      
Beginning balance at Mar. 31, 2024 378.7 $ 0.0 494.5 (0.4) (115.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of Class A common stock upon exercise of stock options (in shares)   104      
Issuance of Class A common stock upon exercise of stock options 0.4   0.4    
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)   730      
Issuance of Class A common stock pursuant to settlement of restricted stock units 0.0        
Class A common stock withheld related to net share settlement of restricted stock units (in shares)   (68)      
Class A common stock withheld related to net share settlement of restricted stock units (0.9)   (0.9)    
Repurchase of Class A common stock (in shares)   (89)      
Repurchase of Class A common stock (1.1)       (1.1)
Stock-based compensation 11.6   11.6    
Other comprehensive income (loss) 0.1     0.1  
Net income (loss) (9.4)       (9.4)
Ending balance (in shares) at Jun. 30, 2024   78,397      
Ending balance at Jun. 30, 2024 379.4 $ 0.0 505.6 (0.3) (125.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of Class A common stock upon exercise of stock options (in shares)   430      
Issuance of Class A common stock upon exercise of stock options 3.1   3.1    
Issuance of Class A common stock pursuant to settlement of restricted stock units (in shares)   981      
Issuance of Class A common stock pursuant to settlement of restricted stock units 0.0        
Class A common stock withheld related to net share settlement of restricted stock units (in shares)   (28)      
Class A common stock withheld related to net share settlement of restricted stock units (0.3)   (0.3)    
Repurchase of Class A common stock (in shares)   (5,752)      
Repurchase of Class A common stock (71.1)       (71.1)
Stock-based compensation 10.9   10.9    
Other comprehensive income (loss) 0.3     0.3  
Net income (loss) $ 0.1       0.1
Ending balance (in shares) at Sep. 30, 2024 74,028 74,028      
Ending balance at Sep. 30, 2024 $ 322.4 $ 0.0 $ 519.3 $ 0.0 $ (196.9)