Annual report [Section 13 and 15(d), not S-K Item 405]

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Preferred Stock
Series A
Preferred Stock
Series B
Preferred Stock
Convertible preferred stock
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income
Accumulated Deficit
Total
Balance at beginning of period at Dec. 31, 2022 $ 49     $ 86 $ 1,306,271   $ (1,182,392) $ 124,014
Balance at beginning of period (in shares) at Dec. 31, 2022 984,000 2,000 5,000 11,454,000        
Increase (Decrease) in Stockholders' Equity                
Exercise of stock options         235     235
Exercise of stock options (in shares)       28,000        
Stock-based compensation expense         9,099     9,099
Issuance of common stock warrants         1,470     1,470
Issuance of common stock related to 401(k) contribution and ESPP         206     206
Issuance of common stock related to 401(k) contribution and ESPP (in shares)       13,000        
Preferred stock dividends         (5,472)     (5,472)
Net loss             (40,831) (40,831)
Balance at end of period at Dec. 31, 2023 $ 49     $ 86 1,311,809   (1,223,223) 88,721
Balance at end of period (in shares) at Dec. 31, 2023 984,000 2,000 5,000 11,495,000        
Increase (Decrease) in Stockholders' Equity                
Exercise of stock options       $ 2 1,830     $ 1,832
Exercise of stock options (in shares)       302,000       301,599
Stock-based compensation expense         10,312     $ 10,312
Issuance of common stock related to 401(k) contribution and ESPP       $ 1 287     288
Issuance of common stock related to 401(k) contribution and ESPP (in shares)       20,000        
Issuance of common stock related to PSUs       $ 1       1
Issuance of common stock related to PSUs (in shares)       136,000        
Repurchase of common stock             (13) (13)
Repurchase of common stock (in shares)       (1,000)        
Preferred stock dividends         (5,472)     (5,472)
Net unrealized gain on available-for-sale debt securities           $ 73   73
Net loss             (13,821) (13,821)
Balance at end of period at Dec. 31, 2024 $ 49     $ 90 $ 1,318,766 $ 73 $ (1,237,057) $ 81,921
Balance at end of period (in shares) at Dec. 31, 2024 984,000 2,000 5,000 11,952,000