Quarterly report pursuant to Section 13 or 15(d)

CONDENSED STATEMENTS OF STOCKHOLDERS' DEFICIT

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CONDENSED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($)
$ in Thousands
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Total
Balance at Dec. 31, 2022 $ 174 $ 1,368,822 $ (153) $ (1,382,459) $ (13,616)
Balance (in shares) at Dec. 31, 2022 173,398,645        
Increase (Decrease) in Stockholders' Equity          
Net loss       (13,536) (13,536)
Net unrealized (loss) gain on short-term investments     126   126
Issuance of common stock upon exercise of options   1     1
Issuance of common stock upon exercise of options (in shares) 952        
Issuance of common stock upon vesting of restricted stock units (RSUs) (in shares) 266,256        
Stock-based compensation expense   2,768     2,768
Balance at Mar. 31, 2023 $ 174 1,371,591 (27) (1,395,995) (24,257)
Balance (in shares) at Mar. 31, 2023 173,665,853        
Balance at Dec. 31, 2023 $ 175 1,378,723 8 (1,407,550) (28,644)
Balance (in shares) at Dec. 31, 2023 174,825,610        
Increase (Decrease) in Stockholders' Equity          
Net loss       (8,247) (8,247)
Net unrealized (loss) gain on short-term investments     (13)   (13)
Issuance of common stock upon exercise of options   89     89
Issuance of common stock upon exercise of options (in shares) 90,544        
Issuance of common stock upon vesting of restricted stock units (RSUs) (in shares) 489,992        
Stock-based compensation expense   5,144     5,144
Balance at Mar. 31, 2024 $ 175 $ 1,383,956 $ (5) $ (1,415,797) $ (31,671)
Balance (in shares) at Mar. 31, 2024 175,406,146