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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Common Stock
Common Stock-Class A
Common Stock
Common Stock-Class B
Additional Paid-In Capital
Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2021   79,524,112 17,722,353    
Balance at Dec. 31, 2021 $ 169,900 $ 1 $ 0 $ 903,470 $ (733,571)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of common stock upon exercise of stock options (in shares)   207,361      
Issuance of common stock upon exercise of stock options 1,464     1,464  
Issuance of restricted stock awards (in shares)   2,515      
Issuance of common stock for settlement of RSUs (in shares)   341,723      
Shares withheld related to net share settlement (in shares)   (117,374)      
Shares withheld related to net share settlement (1,711)     (1,711)  
Conversion of common stock from Class B to Class A (in shares)   3,266 (3,266)    
Conversion of common stock from Class B to Class A 0        
Stock-based compensation 12,968     12,968  
Net loss (18,185)       (18,185)
Ending balance (in shares) at Mar. 31, 2022   79,961,603 17,719,087    
Balance at Mar. 31, 2022 $ 164,436 $ 1 $ 0 916,191 (751,756)
Beginning balance (in shares) at Dec. 31, 2022 99,169,432 81,529,265 17,640,167    
Balance at Dec. 31, 2022 $ 166,555 $ 1 $ 0 955,509 (788,955)
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of common stock upon exercise of stock options (in shares) 77,378 77,378      
Issuance of common stock upon exercise of stock options $ 463     463  
Issuance of restricted stock awards (in shares)   10,375      
Issuance of common stock for settlement of RSUs (in shares)   551,060      
Shares withheld related to net share settlement (in shares)   (193,445)      
Shares withheld related to net share settlement (1,822)     (1,822)  
Stock-based compensation 12,365     12,365  
Net loss $ (12,686)       (12,686)
Ending balance (in shares) at Mar. 31, 2023 99,614,800 81,974,633 17,640,167    
Balance at Mar. 31, 2023 $ 164,875 $ 1 $ 0 $ 966,515 $ (801,641)