v3.23.3
CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
$ in Thousands
Total
Common Stock
Additional Paid-in Capital
Accumulated Other Comprehensive Loss
Accumulated Deficit
Balance at Dec. 31, 2021 $ 168,929 $ 48 $ 800,728 $ (419) $ (631,428)
Balance (in shares) at Dec. 31, 2021   48,120,437      
Issuance of common stock under Employee Stock Purchase Plan (ESPP) 177   177    
Issuance of common stock under Employee Stock Purchase Plan (ESPP) (in shares)   134,888      
Issuance of common stock for settlement of restricted stock units (RSUs) (in shares)   225,869      
Unrealized gain (loss) on marketable debt securities (580)     (580)  
Stock-based compensation 4,575   4,575    
Net loss (70,697)       (70,697)
Balance at Sep. 30, 2022 102,404 $ 48 805,480 (999) (702,125)
Balance (in shares) at Sep. 30, 2022   48,481,194      
Balance at Jun. 30, 2022 123,980 $ 48 803,910 (998) (678,980)
Balance (in shares) at Jun. 30, 2022   48,362,736      
Issuance of common stock for settlement of restricted stock units (RSUs) (in shares)   118,458      
Unrealized gain (loss) on marketable debt securities (1)     (1)  
Stock-based compensation 1,570   1,570    
Net loss (23,145)       (23,145)
Balance at Sep. 30, 2022 102,404 $ 48 805,480 (999) (702,125)
Balance (in shares) at Sep. 30, 2022   48,481,194      
Balance at Dec. 31, 2022 82,664 $ 49 807,938 (803) (724,520)
Balance (in shares) at Dec. 31, 2022   48,894,973      
Issuance of common stock under at-the-market (ATM) equity offering program, net of issuance costs 4,546 $ 3 4,543    
Issuance of common stock under at-the-market (ATM) equity offering program, net of issuance costs (in shares)   3,134,045      
Issuance of common stock under Employee Stock Purchase Plan (ESPP) 80   80    
Issuance of common stock under Employee Stock Purchase Plan (ESPP) (in shares)   90,407      
Issuance of common stock for settlement of restricted stock units (RSUs)   $ 1 (1)    
Issuance of common stock for settlement of restricted stock units (RSUs) (in shares)   494,769      
Unrealized gain (loss) on marketable debt securities 528     528  
Stock-based compensation 4,162   4,162    
Net loss (50,266)       (50,266)
Balance at Sep. 30, 2023 41,714 $ 53 816,722 (275) (774,786)
Balance (in shares) at Sep. 30, 2023   52,614,194      
Balance at Jun. 30, 2023 54,949 $ 52 815,588 (325) (760,366)
Balance (in shares) at Jun. 30, 2023   52,450,731      
Issuance of common stock for settlement of restricted stock units (RSUs)   $ 1 (1)    
Issuance of common stock for settlement of restricted stock units (RSUs) (in shares)   163,463      
Unrealized gain (loss) on marketable debt securities 50     50  
Stock-based compensation 1,135   1,135    
Net loss (14,420)       (14,420)
Balance at Sep. 30, 2023 $ 41,714 $ 53 $ 816,722 $ (275) $ (774,786)
Balance (in shares) at Sep. 30, 2023   52,614,194