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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Beginning balance, value at Dec. 31, 2021 $ (93,621) $ 9 $ 957,730 $ (1,051,360)
Beginning balance, shares at Dec. 31, 2021   8,598    
Shares issued for vested restricted stock units (in shares)   71    
Share-based compensation 2,062   2,062  
Net income (loss) (49,021)     (49,021)
Ending balance, value at Mar. 31, 2022 (140,580) $ 9 959,792 (1,100,381)
Ending balance, shares at Mar. 31, 2022   8,669    
Beginning balance, value at Dec. 31, 2021 (93,621) $ 9 957,730 (1,051,360)
Beginning balance, shares at Dec. 31, 2021   8,598    
Net income (loss) 34,295      
Ending balance, value at Sep. 30, 2022 (48,271) $ 9 968,785 (1,017,065)
Ending balance, shares at Sep. 30, 2022   9,467    
Beginning balance, value at Mar. 31, 2022 (140,580) $ 9 959,792 (1,100,381)
Beginning balance, shares at Mar. 31, 2022   8,669    
Shares issued for vested restricted stock units (in shares)   44    
Share-based compensation 2,219   2,219  
Shares issued for rounding up of fractional shares in connection with the reverse stock split   142    
Shares issued for sale of common stock related to employee stock purchase plan 14   14  
Shares issued for sale of common stock related to employee stock purchase plan (in shares)   5    
Net income (loss) 112,281     112,281
Ending balance, value at Jun. 30, 2022 (26,066) $ 9 962,025 (988,100)
Ending balance, shares at Jun. 30, 2022   8,860    
Shares issued for sale of common stock related to private placement sale (in shares)   565    
Shares issued for sale of common stock related to private placement sale 2,454   2,454  
Shares issued for vested restricted stock units (in shares)   42    
Share-based compensation 4,306   4,306  
Net income (loss) (28,965)     (28,965)
Ending balance, value at Sep. 30, 2022 (48,271) $ 9 968,785 (1,017,065)
Ending balance, shares at Sep. 30, 2022   9,467    
Beginning balance, value at Dec. 31, 2022 $ 35,143 $ 9 974,497 (939,363)
Beginning balance, shares at Dec. 31, 2022 9,498 9,498    
Shares issued for vested restricted stock units (in shares)   455    
Shares issued for vested restricted stock units $ 1 $ 1    
Share-based compensation 483   483  
Net income (loss) (3,603)     (3,603)
Ending balance, value at Mar. 31, 2023 32,024 $ 10 974,980 (942,966)
Ending balance, shares at Mar. 31, 2023   9,953    
Beginning balance, value at Dec. 31, 2022 $ 35,143 $ 9 974,497 (939,363)
Beginning balance, shares at Dec. 31, 2022 9,498 9,498    
Net income (loss) $ (9,395)      
Ending balance, value at Sep. 30, 2023 $ 28,052 $ 11 976,799 (948,758)
Ending balance, shares at Sep. 30, 2023 10,575 10,575    
Beginning balance, value at Mar. 31, 2023 $ 32,024 $ 10 974,980 (942,966)
Beginning balance, shares at Mar. 31, 2023   9,953    
Shares issued for sale of common stock related to private placement sale (in shares)   313    
Shares issued for sale of common stock related to private placement sale 1,150 $ 1 1,149  
Shares issued for vested restricted stock units (in shares)   309    
Share-based compensation 437   437  
Net income (loss) (2,414)     (2,414)
Ending balance, value at Jun. 30, 2023 31,197 $ 11 976,566 (945,380)
Ending balance, shares at Jun. 30, 2023   10,575    
Share-based compensation 233   233  
Net income (loss) (3,378)     (3,378)
Ending balance, value at Sep. 30, 2023 $ 28,052 $ 11 $ 976,799 $ (948,758)
Ending balance, shares at Sep. 30, 2023 10,575 10,575