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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($)
shares in Thousands, $ in Thousands
Total
Common stock
Preferred stock
Additional paid-in capital
Accumulated deficit
Accumulated other comprehensive loss
Treasury stock
Beginning balance (in shares) at Dec. 31, 2022   51,102         6,151
Increase (Decrease) in Stockholders' Equity              
Common stock issued upon vesting of restricted stock   285          
Common stock issued for ESPP purchases   68          
Tax withholding upon vesting of employee stock awards             102
Ending balance (in shares) at Jun. 30, 2023   51,455         6,253
Ending balance at Jun. 30, 2023   $ 5          
Beginning balance at Dec. 31, 2022   $ 5          
Beginning balance at Dec. 31, 2022       $ 982,718 $ (173,829) $ (522) $ (162,546)
Increase (Decrease) in Stockholders' Equity              
Stock-based compensation to employees and directors       12,065      
Common stock issued for ESPP purchases       1,121      
Net loss $ (83,800)       (83,800)    
Net other comprehensive income 8         8  
Tax withholding upon vesting of employee stock awards             2,054
Ending balance at Jun. 30, 2023 573,166     995,904 (257,629) (514) $ (164,600)
Beginning balance (in shares) at Mar. 31, 2023   51,438         6,247
Increase (Decrease) in Stockholders' Equity              
Common stock issued upon vesting of restricted stock   17          
Common stock issued for ESPP purchases   0          
Tax withholding upon vesting of employee stock awards             6
Ending balance (in shares) at Jun. 30, 2023   51,455         6,253
Ending balance at Jun. 30, 2023   $ 5          
Beginning balance at Mar. 31, 2023       989,634 (184,136) (518) $ (164,480)
Increase (Decrease) in Stockholders' Equity              
Stock-based compensation to employees and directors       6,270      
Common stock issued for ESPP purchases       0      
Net loss (73,493)       (73,493)    
Net other comprehensive income 4         4  
Tax withholding upon vesting of employee stock awards             120
Ending balance at Jun. 30, 2023 $ 573,166     995,904 (257,629) (514) $ (164,600)
Increase (Decrease) in Stockholders' Equity              
Common stock, shares outstanding (in shares)   45,202          
Preferred stock, $0.0001 par value, authorized shares - 5,000, issued and outstanding - none     $ 0        
Common stock, shares outstanding (in shares) 45,414            
Preferred stock, $0.0001 par value, authorized shares - 5,000, issued and outstanding - none $ 0            
Beginning balance (in shares) at Dec. 31, 2023   51,770         6,356
Increase (Decrease) in Stockholders' Equity              
Common stock issued upon vesting of restricted stock   404          
Common stock issued for ESPP purchases   56          
Tax withholding upon vesting of employee stock awards             124
Ending balance (in shares) at Jun. 30, 2024   52,230         6,480
Ending balance at Jun. 30, 2024   $ 5          
Beginning balance at Dec. 31, 2023   $ 5          
Beginning balance at Dec. 31, 2023 359,132     1,007,649 (481,671) (506) $ (166,345)
Increase (Decrease) in Stockholders' Equity              
Stock-based compensation to employees and directors       10,035      
Common stock issued for ESPP purchases       935      
Net loss (116,506)       (116,506)    
Net other comprehensive income 8         8  
Tax withholding upon vesting of employee stock awards             3,250
Ending balance at Jun. 30, 2024 250,354     1,018,619 (598,177) (498) $ (169,595)
Beginning balance (in shares) at Mar. 31, 2024   52,210         6,477
Increase (Decrease) in Stockholders' Equity              
Common stock issued upon vesting of restricted stock   20          
Common stock issued for ESPP purchases   0          
Tax withholding upon vesting of employee stock awards             3
Ending balance (in shares) at Jun. 30, 2024   52,230         6,480
Ending balance at Jun. 30, 2024   $ 5          
Beginning balance at Mar. 31, 2024       1,013,360 (555,599) (502) $ (169,517)
Increase (Decrease) in Stockholders' Equity              
Stock-based compensation to employees and directors       5,259      
Common stock issued for ESPP purchases       0      
Net loss (42,578)       (42,578)    
Net other comprehensive income 4         4  
Tax withholding upon vesting of employee stock awards             78
Ending balance at Jun. 30, 2024 $ 250,354     $ 1,018,619 $ (598,177) $ (498) $ (169,595)
Increase (Decrease) in Stockholders' Equity              
Common stock, shares outstanding (in shares) 45,750 45,750          
Preferred stock, $0.0001 par value, authorized shares - 5,000, issued and outstanding - none $ 0   $ 0