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CONSOLIDATED STATEMENTS OF (DEFICIT) EQUITY - USD ($)
$ in Thousands
Series A Convertible Preferred Stock
Preferred Stock
Common Stock
Additional Paid-in Capital
Treasury Stock
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Total
Balance Beginning at Dec. 31, 2022 $ 4,043 $ 50 $ 542,428     $ (430,521) $ 116,000
Balance Beginning (in shares) at Dec. 31, 2022 4,300 49,642,767   7,307      
Increase (Decrease) in Stockholders' Equity (Deficit)              
Stock-based compensation expense     3,741       3,741
Net issuance of common stock in connection with the vesting of restricted stock (in shares)   22,350          
Unrealized gain (loss) on short-term investments         $ 74   74
Net income (loss)           (34,730) (34,730)
Balance Ending at Mar. 31, 2023 $ 4,043 $ 50 546,169   74 (465,251) 85,085
Balance Ending (in shares) at Mar. 31, 2023 4,300 49,665,117   7,307      
Balance Beginning at Dec. 31, 2022 $ 4,043 $ 50 542,428     (430,521) $ 116,000
Balance Beginning (in shares) at Dec. 31, 2022 4,300 49,642,767   7,307      
Increase (Decrease) in Stockholders' Equity (Deficit)              
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529 (in shares)             0
Balance Ending at Sep. 30, 2023   $ 55 584,710   (71) (530,157) $ 54,537
Balance Ending (in shares) at Sep. 30, 2023   54,573,490   7,307      
Balance Beginning at Mar. 31, 2023 $ 4,043 $ 50 546,169   74 (465,251) 85,085
Balance Beginning (in shares) at Mar. 31, 2023 4,300 49,665,117   7,307      
Increase (Decrease) in Stockholders' Equity (Deficit)              
Stock-based compensation expense     3,891       3,891
Net issuance of common stock in connection with the vesting of restricted stock (in shares)   11,625          
Exercise of stock options     485       485
Exercise of stock options (in shares)   72,440          
Conversion of convertible preferred stock into common $ (4,043) $ 1 4,042        
Conversion of convertible preferred stock into common stock (in shares) (4,300) 860,000          
Unrealized gain (loss) on short-term investments         (188)   (188)
Net income (loss)           (31,934) (31,934)
Balance Ending at Jun. 30, 2023   $ 51 554,587   (114) (497,185) 57,339
Balance Ending (in shares) at Jun. 30, 2023   50,609,182   7,307      
Increase (Decrease) in Stockholders' Equity (Deficit)              
Stock-based compensation expense     4,006       4,006
Net issuance of common stock in connection with the vesting of restricted stock (in shares)   224,170          
Exercise of stock options     298       298
Exercise of stock options (in shares)   50,338          
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529   $ 4 25,819       $ 25,823
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529 (in shares)   3,689,800         0
Unrealized gain (loss) on short-term investments         43   $ 43
Net income (loss)           (32,972) (32,972)
Balance Ending at Sep. 30, 2023   $ 55 584,710   (71) (530,157) 54,537
Balance Ending (in shares) at Sep. 30, 2023   54,573,490   7,307      
Balance Beginning at Dec. 31, 2023   $ 55 588,656   (20) (571,926) 16,765
Balance Beginning (in shares) at Dec. 31, 2023   54,578,121   7,307      
Increase (Decrease) in Stockholders' Equity (Deficit)              
Stock-based compensation expense     5,193       5,193
Net issuance of common stock in connection with the vesting of restricted stock (in shares)   295,256          
Exercise of stock options     257       257
Exercise of stock options (in shares)   57,665          
Unrealized gain (loss) on short-term investments         20   20
Net income (loss)           (38,669) (38,669)
Balance Ending at Mar. 31, 2024   $ 55 594,106     (610,595) (16,434)
Balance Ending (in shares) at Mar. 31, 2024   54,931,042   7,307      
Balance Beginning at Dec. 31, 2023   $ 55 588,656   $ (20) (571,926) $ 16,765
Balance Beginning (in shares) at Dec. 31, 2023   54,578,121   7,307      
Increase (Decrease) in Stockholders' Equity (Deficit)              
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529 (in shares)             0
Net income (loss)             $ (98,700)
Balance Ending at Sep. 30, 2024   $ 55 603,853     (670,648) (66,740)
Balance Ending (in shares) at Sep. 30, 2024   55,185,622   7,307      
Balance Beginning at Mar. 31, 2024   $ 55 594,106     (610,595) (16,434)
Balance Beginning (in shares) at Mar. 31, 2024   54,931,042   7,307      
Increase (Decrease) in Stockholders' Equity (Deficit)              
Stock-based compensation expense     4,917       4,917
Net issuance of common stock in connection with the vesting of restricted stock (in shares)   32,877          
Net income (loss)           (35,828) (35,828)
Balance Ending at Jun. 30, 2024   $ 55 599,023     (646,423) (47,345)
Balance Ending (in shares) at Jun. 30, 2024   54,963,919   7,307      
Increase (Decrease) in Stockholders' Equity (Deficit)              
Stock-based compensation expense     4,830       $ 4,830
Net issuance of common stock in connection with the vesting of restricted stock (in shares)   221,703          
Issuance of common stock in connection with at-the-market facility offering (average price of $7.17 per share), net of expenses of $529 (in shares)             0
Net income (loss)           (24,225) $ (24,225)
Balance Ending at Sep. 30, 2024   $ 55 $ 603,853     $ (670,648) $ (66,740)
Balance Ending (in shares) at Sep. 30, 2024   55,185,622   7,307