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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
At-The-Market Offering
Stock Issuances Excluding At-The-Market Offering
Common Stock
Common Stock
At-The-Market Offering
Common Stock
Stock Issuances Excluding At-The-Market Offering
Additional Paid-in Capital
Additional Paid-in Capital
At-The-Market Offering
Additional Paid-in Capital
Stock Issuances Excluding At-The-Market Offering
Accumulated Deficit
Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2023       178,133,548              
Beginning balance at Dec. 31, 2023 $ 82,887     $ 1,781     $ 1,492,077     $ (1,406,376) $ (4,595)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Issuance of common stock (in shares)       24,761,905              
Issuance of common stock 21,788     $ 248     21,540        
Issuance of common stock upon exercise of pre-funded warrants (in shares)       3,809,523              
Issuance of common stock upon exercise of pre-funded warrants 71     $ 38     33        
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (in shares)       1,535,250              
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (684)     $ 15     (699)        
Issuance of common stock under employee stock purchase plan (in shares)       379,486              
Issuance of common stock under employee stock purchase plan 146     $ 4     142        
Stock-based compensation 9,099           9,099        
Foreign currency translation adjustment 371                   371
Net pension gains 234                   234
Net unrealized loss on marketable securities, net of tax (233)                   (233)
Net (loss) income (74,545)                 (74,545)  
Ending balance (in shares) at Sep. 30, 2024       208,619,712              
Ending balance at Sep. 30, 2024 39,134     $ 2,086     1,522,192     (1,480,921) (4,223)
Beginning balance (in shares) at Jun. 30, 2024       208,201,140              
Beginning balance at Jun. 30, 2024 23,690     $ 2,082     1,519,084     (1,491,593) (5,883)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (in shares)       418,572              
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (203)     $ 4     (207)        
Stock-based compensation 3,315           3,315        
Foreign currency translation adjustment 1,664                   1,664
Net pension gains (4)                   (4)
Net unrealized loss on marketable securities, net of tax 0                    
Net (loss) income 10,672                 10,672  
Ending balance (in shares) at Sep. 30, 2024       208,619,712              
Ending balance at Sep. 30, 2024 39,134     $ 2,086     1,522,192     (1,480,921) (4,223)
Beginning balance (in shares) at Dec. 31, 2024       212,837,679              
Beginning balance at Dec. 31, 2024 22,770     $ 2,128     1,532,489     (1,504,317) (7,530)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Issuance of common stock (in shares)         57,190,286 12,235,000          
Issuance of common stock   $ 37,203 $ 21,139   $ 572 $ 122   $ 36,631 $ 21,017    
Issuance of common stock upon exercise of pre-funded warrants (in shares)       34,398,393              
Issuance of common stock upon exercise of pre-funded warrants 344     $ 344              
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (in shares)       4,884,546              
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (2,914)     $ 49     (2,963)        
Issuance of common stock under employee stock purchase plan (in shares)       463,135              
Issuance of common stock under employee stock purchase plan 180     $ 5     175        
Stock-based compensation 6,949           6,949        
Foreign currency translation adjustment 5,994                   5,994
Net pension gains 91                   91
Net unrealized loss on marketable securities, net of tax 0                    
Net (loss) income (85,513)                 (85,513)  
Ending balance (in shares) at Sep. 30, 2025       322,009,039              
Ending balance at Sep. 30, 2025 6,243     $ 3,220     1,594,298     (1,589,830) (1,445)
Beginning balance (in shares) at Jun. 30, 2025       272,803,887              
Beginning balance at Jun. 30, 2025 19,602     $ 2,728     1,573,233     (1,554,900) (1,459)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                      
Issuance of common stock (in shares)         36,382,577            
Issuance of common stock   $ 19,577     $ 364     $ 19,213      
Issuance of common stock upon exercise of pre-funded warrants (in shares)       12,000,000              
Issuance of common stock upon exercise of pre-funded warrants 120     $ 120              
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (in shares)       822,575              
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (267)     $ 8     (275)        
Stock-based compensation 2,127           2,127        
Foreign currency translation adjustment 14                   14
Net pension gains 0                    
Net unrealized loss on marketable securities, net of tax 0                    
Net (loss) income (34,930)                 (34,930)  
Ending balance (in shares) at Sep. 30, 2025       322,009,039              
Ending balance at Sep. 30, 2025 $ 6,243     $ 3,220     $ 1,594,298     $ (1,589,830) $ (1,445)