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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
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, net of offering expenses (in shares)   24,761,905      
Issuance of common stock, net of offering expenses 21,788 $ 248 21,540    
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (in shares)   790,633      
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (402) $ 8 (410)    
Stock-based compensation 2,719   2,719    
Foreign currency translation adjustment (980)       (980)
Net pension gains 7       7
Net unrealized loss on marketable securities, net of tax (233)       (233)
Net loss (49,089)     (49,089)  
Ending balance (in shares) at Mar. 31, 2024   203,686,086      
Ending balance at Mar. 31, 2024 56,697 $ 2,037 1,515,926 (1,455,465) (5,801)
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, net of offering expenses (in shares)   9,528,752      
Issuance of common stock, net of offering expenses 10,361 $ 96 10,265    
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (in shares)   2,997,659      
Issuance of common stock upon exercise of stock options and vesting of restricted stock units, net of tax (2,227) $ 30 (2,257)    
Stock-based compensation 2,596   2,596    
Foreign currency translation adjustment 1,912       1,912
Net pension gains 91       91
Net unrealized loss on marketable securities, net of tax 0        
Net loss (30,597)     (30,597)  
Ending balance (in shares) at Mar. 31, 2025   225,364,090      
Ending balance at Mar. 31, 2025 $ 4,906 $ 2,254 $ 1,543,093 $ (1,534,914) $ (5,527)