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Condensed Statements of Stockholders’ Equity (unaudited) - USD ($)
$ in Thousands
Total
Follow-on Offering
At-the-Market Equity Offering
Common Stock
Common Stock
Follow-on Offering
Common Stock
At-the-Market Equity Offering
Additional Paid-In Capital
Additional Paid-In Capital
Follow-on Offering
Additional Paid-In Capital
At-the-Market Equity Offering
Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2023       27,823,465            
Beginning balance at Dec. 31, 2023 $ 20,654     $ 28     $ 524,435     $ (503,809)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net loss (8,925)                 (8,925)
Issuance of common stock pursuant to stock option exercises (in shares)       409,045            
Issuance of common stock pursuant to stock option exercises 721           721      
Issuance of common stock upon vesting of restricted stock units (in shares)       522,483            
Issuance of common stock upon vesting of restricted stock units 0     $ 1     (1)      
Shares withheld for taxes (in shares)       (37,541)            
Shares withheld for taxes (649)           (649)      
Stock-based compensation 2,540           2,540      
Ending balance (in shares) at Mar. 31, 2024       28,717,452            
Ending balance at Mar. 31, 2024 14,341     $ 29     527,046     (512,734)
Beginning balance (in shares) at Dec. 31, 2023       27,823,465            
Beginning balance at Dec. 31, 2023 20,654     $ 28     524,435     (503,809)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net loss (16,439)                  
Ending balance (in shares) at Jun. 30, 2024       29,139,206            
Ending balance at Jun. 30, 2024 9,885     $ 29     530,104     (520,248)
Beginning balance (in shares) at Mar. 31, 2024       28,717,452            
Beginning balance at Mar. 31, 2024 14,341     $ 29     527,046     (512,734)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net loss (7,514)                 (7,514)
Repurchase of common stock (in shares)       (1,282)            
Repurchase of common stock from KCK Ltd. 0                  
Issuance of common stock pursuant to stock option exercises (in shares)       95,008            
Issuance of common stock pursuant to stock option exercises 53           53      
Issuance of common stock pursuant to Employee Stock Purchase Plan (in shares)       94,743            
Issuance of common stock pursuant to Employee Stock Purchase Plan 528           528      
Issuance of common stock upon vesting of restricted stock units (in shares)       242,518            
Issuance of common stock upon vesting of restricted stock units 0                  
Shares withheld for taxes (in shares)       (9,233)            
Shares withheld for taxes (72)           (72)      
Change in early exercise liability 1           1      
Stock-based compensation 2,548           2,548      
Ending balance (in shares) at Jun. 30, 2024       29,139,206            
Ending balance at Jun. 30, 2024 $ 9,885     $ 29     530,104     (520,248)
Beginning balance (in shares) at Dec. 31, 2024 30,145,039     30,145,039            
Beginning balance at Dec. 31, 2024 $ 8,013     $ 30     538,933     (530,950)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net loss (6,589)                 (6,589)
Issuance of shares (in shares)         7,475,000 18,590        
Issuance of shares   $ 69,384 $ 224   $ 7     $ 69,377 $ 224  
Repurchase of common stock (in shares)       (5,270,845)            
Repurchase of common stock from KCK Ltd. (49,546)     $ (5)     (49,541)      
Issuance of common stock pursuant to stock option exercises (in shares)       101,301            
Issuance of common stock pursuant to stock option exercises 385     $ 1     384      
Issuance of common stock upon vesting of restricted stock units (in shares)       299,535            
Issuance of common stock upon vesting of restricted stock units 0                  
Shares withheld for taxes (in shares)       (17,380)            
Shares withheld for taxes (228)           (228)      
Stock-based compensation 2,626           2,626      
Ending balance (in shares) at Mar. 31, 2025       32,751,240            
Ending balance at Mar. 31, 2025 $ 24,269     $ 33     561,775     (537,539)
Beginning balance (in shares) at Dec. 31, 2024 30,145,039     30,145,039            
Beginning balance at Dec. 31, 2024 $ 8,013     $ 30     538,933     (530,950)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net loss $ (15,240)                  
Issuance of common stock pursuant to stock option exercises (in shares) 122,972                  
Ending balance (in shares) at Jun. 30, 2025 33,044,371     33,044,371            
Ending balance at Jun. 30, 2025 $ 19,438     $ 33     565,595     (546,190)
Beginning balance (in shares) at Mar. 31, 2025       32,751,240            
Beginning balance at Mar. 31, 2025 24,269     $ 33     561,775     (537,539)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                    
Net loss (8,651)                 (8,651)
Issuance of common stock pursuant to stock option exercises (in shares)       21,671            
Issuance of common stock pursuant to stock option exercises 146           146      
Issuance of common stock pursuant to Employee Stock Purchase Plan (in shares)       66,627            
Issuance of common stock pursuant to Employee Stock Purchase Plan 620           620      
Issuance of common stock upon vesting of restricted stock units (in shares)       215,924            
Issuance of common stock upon vesting of restricted stock units 0                  
Shares withheld for taxes (in shares)       (11,091)            
Shares withheld for taxes (174)           (174)      
Stock-based compensation $ 3,228           3,228      
Ending balance (in shares) at Jun. 30, 2025 33,044,371     33,044,371            
Ending balance at Jun. 30, 2025 $ 19,438     $ 33     $ 565,595     $ (546,190)