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Consolidated statements of stockholders' equity - USD ($)
$ in Thousands
Total
Common stock
Additional paid-in capital
Treasury stock (at cost)
Accumulated deficit
Balance at beginning of period (in shares) at Dec. 31, 2020   12,020,000      
Balance at beginning of period at Dec. 31, 2020 $ (21,443) $ 120 $ 2,398,464 $ 0 $ (2,420,027)
Balance at beginning of period (in shares) at Dec. 31, 2020       0  
Increase (Decrease) in Stockholders' Equity          
Restricted stock awards (in shares)   194,000      
Restricted stock awards 0 $ 2 (2)    
Restricted stock forfeitures (in shares)   (41,000)      
Stock exchanged for tax withholding (in shares)       44,000  
Stock exchanged for tax withholding (1,741)     $ (1,741)  
Retirement of treasury stock (in shares)   (44,000)   (44,000)  
Retirement of treasury stock 0   (1,741) $ 1,741  
Share-settled equity-based compensation 4,510   4,510    
Issuance of common stock, net of costs (in shares)   1,438,000      
Issuance of common stock, net of costs 72,492 $ 14 72,478    
Performance share conversion (in shares)   6,000      
Net income (loss) (208,100)       (208,100)
Balance at end of period (in shares) at Jun. 30, 2021   13,573,000      
Balance at end of period at Jun. 30, 2021 (154,282) $ 136 2,473,709 $ 0 (2,628,127)
Balance at end of period (in shares) at Jun. 30, 2021       0  
Balance at beginning of period (in shares) at Mar. 31, 2021   12,900,000      
Balance at beginning of period at Mar. 31, 2021 (68,568) $ 129 2,426,769 $ 0 (2,495,466)
Balance at beginning of period (in shares) at Mar. 31, 2021       0  
Increase (Decrease) in Stockholders' Equity          
Restricted stock awards (in shares)   6,000      
Restricted stock forfeitures (in shares)   (40,000)      
Stock exchanged for tax withholding (in shares)       7,000  
Stock exchanged for tax withholding (451)     $ (451)  
Retirement of treasury stock (in shares)   (7,000)   (7,000)  
Retirement of treasury stock 0   (451) $ 451  
Share-settled equity-based compensation 1,772   1,772    
Issuance of common stock, net of costs (in shares)   714,000      
Issuance of common stock, net of costs 45,626 $ 7 45,619    
Net income (loss) (132,661)       (132,661)
Balance at end of period (in shares) at Jun. 30, 2021   13,573,000      
Balance at end of period at Jun. 30, 2021 $ (154,282) $ 136 2,473,709 $ 0 (2,628,127)
Balance at end of period (in shares) at Jun. 30, 2021       0  
Balance at beginning of period (in shares) at Dec. 31, 2021 17,074,516 17,075,000      
Balance at beginning of period at Dec. 31, 2021 $ 513,780 $ 171 2,788,628 $ 0 (2,275,019)
Balance at beginning of period (in shares) at Dec. 31, 2021       0  
Increase (Decrease) in Stockholders' Equity          
Restricted stock awards (in shares)   237,000      
Restricted stock awards 0 $ 2 (2)    
Restricted stock forfeitures (in shares)   (7,000)      
Share repurchases (in shares)       85,000  
Share repurchases (9,071)     $ (9,071)  
Stock exchanged for tax withholding (in shares)       83,000  
Stock exchanged for tax withholding (6,589)     $ (6,589)  
Retirement of treasury stock (in shares)   (168,000)   (168,000)  
Retirement of treasury stock 0 $ (2) (15,658) $ 15,660  
Share-settled equity-based compensation 5,571   5,571    
Performance share conversion (in shares)   75,000      
Performance share conversion   $ 1 (1)    
Net income (loss) $ 175,765       175,765
Balance at end of period (in shares) at Jun. 30, 2022 17,212,383 17,212,000      
Balance at end of period at Jun. 30, 2022 $ 679,456 $ 172 2,778,538 $ 0 (2,099,254)
Balance at end of period (in shares) at Jun. 30, 2022       0  
Balance at beginning of period (in shares) at Mar. 31, 2022   17,302,000      
Balance at beginning of period at Mar. 31, 2022 423,788 $ 173 2,785,415 $ 0 (2,361,800)
Balance at beginning of period (in shares) at Mar. 31, 2022       0  
Increase (Decrease) in Stockholders' Equity          
Restricted stock awards (in shares)   5,000      
Restricted stock forfeitures (in shares)   (3,000)      
Share repurchases (in shares)       85,000  
Share repurchases (9,071)     $ (9,071)  
Stock exchanged for tax withholding (in shares)       7,000  
Stock exchanged for tax withholding (742)     $ (742)  
Retirement of treasury stock (in shares)   (92,000)   (92,000)  
Retirement of treasury stock 0 $ (1) (9,812) $ 9,813  
Share-settled equity-based compensation 2,935   2,935    
Net income (loss) $ 262,546       262,546
Balance at end of period (in shares) at Jun. 30, 2022 17,212,383 17,212,000      
Balance at end of period at Jun. 30, 2022 $ 679,456 $ 172 $ 2,778,538 $ 0 $ (2,099,254)
Balance at end of period (in shares) at Jun. 30, 2022       0