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Condensed consolidated statements of stockholders' equity - USD ($)
$ in Thousands
Total
Class A Common stock
Class B Common stock
Common stock
Class A Common stock
Common stock
Class B Common stock
Additional paid-in capital
Accumulated deficit
Accumulated other comprehensive income (loss)
Balance at beginning of period (in shares) at Dec. 31, 2023       37,099,909 5,309,529      
Balance at beginning of period at Dec. 31, 2023 $ 117,989     $ 371 $ 53 $ 546,051 $ (428,385) $ (101)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of Class A common stock under ESPP (in shares)       198,299        
Issuance of Class A common stock under ESPP 168     $ 2   166    
Vesting of restricted stock units (in shares)       185,331        
Vesting of restricted stock units 0     $ 2   (2)    
Issuance of Class A common stock upon exercise of common stock options (in shares)       20        
Issuance of Class A common stock upon exercise of common stock options 0              
Stock-based compensation expense 1,085         1,085    
Net loss (13,322)           (13,322)  
Other comprehensive income (loss) 23             23
Balance at end of period (in shares) at Mar. 31, 2024       37,483,559 5,309,529      
Balance at end of period at Mar. 31, 2024 105,943     $ 375 $ 53 547,300 (441,707) (78)
Balance at beginning of period (in shares) at Dec. 31, 2024   37,729,242 5,309,529 37,729,242 5,309,529      
Balance at beginning of period at Dec. 31, 2024 75,352     $ 377 $ 53 550,157 (475,274) 39
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Issuance of Class A common stock under ESPP (in shares)       127,335        
Issuance of Class A common stock under ESPP 90     $ 1   89    
Vesting of restricted stock units (in shares)       251,707        
Vesting of restricted stock units $ 0     $ 3   (3)    
Issuance of Class A common stock upon exercise of common stock options (in shares) 273,385     273,385        
Issuance of Class A common stock upon exercise of common stock options $ 296     $ 3   293    
Stock-based compensation expense 1,042         1,042    
Conversion of Class B common stock to Class A common stock (in shares)   810,000 (810,000) 810,000 (810,000)      
Conversion of Class B common stock to Class A common stock 0     $ 8 $ (8)      
Net loss (11,263)           (11,263)  
Other comprehensive income (loss) (26)             (26)
Balance at end of period (in shares) at Mar. 31, 2025   39,191,669 4,499,529 39,191,669 4,499,529      
Balance at end of period at Mar. 31, 2025 $ 65,491     $ 392 $ 45 $ 551,578 $ (486,537) $ 13