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Redeemable Preferred Stock and Stockholders Equity - RSU and RSA activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Weighted-average grant date fair value (per share)              
Non-cash stock-based compensation expense $ 2,000     $ 1,800 $ 6,150 $ 5,215  
Percentage of shares of common stock issued and outstanding on a fully diluted basis         5.00%    
RSUs and RSAs              
Weighted-average grant date fair value (per share)              
Non-cash compensation expense not yet charged to net income         $ 14,500   $ 13,500
RSUs and RSAs | Certain employees              
Number of shares              
Outstanding, Beginning balance 982,628 984,278 888,777   888,777    
Granted (in shares) 4,154 18,192 349,824        
Vested (in shares) (11,596) (17,516) (252,259)        
Forfeited (in shares) (3,266) (2,326) (2,064)        
Outstanding, Ending balance 971,920 982,628 984,278   971,920   888,777
Grant date fair value              
Beginning balance $ 14,638 $ 14,664 $ 13,517   $ 13,517    
Granted 55 264 4,964        
Vested (167) (257) (3,791)        
Forfeited (46) (33) (26)        
Ending balance $ 14,480 $ 14,638 $ 14,664   $ 14,480   $ 13,517
Weighted-average grant date fair value (per share)              
Beginning balance $ 14.90 $ 14.90 $ 15.21   $ 15.21    
Granted (in per share) 13.24 14.52 14.19        
Vested (in per share) 14.36 14.66 15.03        
Forfeited (in per share) 14.14 14.19 12.82        
Ending balance $ 14.90 $ 14.90 $ 14.90   $ 14.90   $ 15.21