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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Accumulated (Deficit) Earnings | Accumulated Other Comprehensive Income
--- | --- | --- | --- | --- | ---
Balance at period start (in shares) at Dec. 31, 2021 |  | 60,162 |  |  |
Balance at period start at Dec. 31, 2021 | $ 265,700 | $ 602 | $ 821,713 | $ (559,117) | $ 2,502
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock-based compensation (in shares) |  | 412 |  |  |
Stock-based compensation | 3,658 | $ 3 | 3,655 |  |
Purchase of common stock for retirement (in shares) |  | (462) |  |  |
Purchase of common stock for retirement | (6,390) | $ (4) | (1,431) | (4,955) |
Net loss (income) | (137,051) |  |  | (137,051) |
Balance at period end (in shares) at Mar. 31, 2022 |  | 60,112 |  |  |
Balance at period end at Mar. 31, 2022 | 125,917 | $ 601 | 823,937 | (701,123) | 2,502
Balance at period start (in shares) at Dec. 31, 2021 |  | 60,162 |  |  |
Balance at period start at Dec. 31, 2021 | 265,700 | $ 602 | 821,713 | (559,117) | 2,502
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss (income) | 279,470 |  |  |  |
Balance at period end (in shares) at Sep. 30, 2022 |  | 60,158 |  |  |
Balance at period end at Sep. 30, 2022 | 546,892 | $ 601 | 829,195 | (285,406) | 2,502
Balance at period start (in shares) at Mar. 31, 2022 |  | 60,112 |  |  |
Balance at period start at Mar. 31, 2022 | 125,917 | $ 601 | 823,937 | (701,123) | 2,502
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance of common stock for employee stock purchase plan (in shares) |  | 41 |  |  |
Issuance of common stock for employee stock purchase plan | 632 |  | 632 |  |
Stock-based compensation (in shares) |  | 3 |  |  |
Stock-based compensation | 2,017 |  | 2,017 |  |
Purchase of common stock for retirement (in shares) |  | (1) |  |  |
Purchase of common stock for retirement | (94) |  | (94) |  |
Exercise of stock options (in shares) |  | 65 |  |  |
Exercise of stock options | 1,132 | $ 1 | 1,131 |  |
Net loss (income) | 149,125 |  |  | 149,125 |
Balance at period end (in shares) at Jun. 30, 2022 |  | 60,220 |  |  |
Balance at period end at Jun. 30, 2022 | 278,729 | $ 602 | 827,623 | (551,998) | 2,502
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock-based compensation (in shares) |  | (2) |  |  |
Stock-based compensation | 1,613 |  | 1,613 |  |
Purchase of common stock for retirement (in shares) |  | (60) |  |  |
Purchase of common stock for retirement | (846) | $ (1) | (41) | (804) |
Net loss (income) | 267,396 |  |  | 267,396 |
Balance at period end (in shares) at Sep. 30, 2022 |  | 60,158 |  |  |
Balance at period end at Sep. 30, 2022 | 546,892 | $ 601 | 829,195 | (285,406) | 2,502
Balance at period start (in shares) at Dec. 31, 2022 |  | 60,471 |  |  |
Balance at period start at Dec. 31, 2022 | 644,537 | $ 604 | 836,491 | (200,687) | 8,129
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock-based compensation (in shares) |  | 340 |  |  |
Stock-based compensation | 2,317 |  | 2,317 |  |
Purchase of common stock for retirement (in shares) |  | (81) |  |  |
Purchase of common stock for retirement | (3,114) |  | (3,114) |  |
Exercise of stock options (in shares) |  | 300 |  |  |
Exercise of stock options | 6,374 | $ 6 | 6,368 |  |
Other comprehensive loss | (11) |  |  |  | (11)
Net loss (income) | 237,890 |  |  | 237,890 |
Balance at period end (in shares) at Mar. 31, 2023 |  | 61,030 |  |  |
Balance at period end at Mar. 31, 2023 | 887,993 | $ 610 | 842,062 | 37,203 | 8,118
Balance at period start (in shares) at Dec. 31, 2022 |  | 60,471 |  |  |
Balance at period start at Dec. 31, 2022 | 644,537 | $ 604 | 836,491 | (200,687) | 8,129
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net loss (income) | 439,318 |  |  |  |
Balance at period end (in shares) at Sep. 30, 2023 |  | 60,518 |  |  |
Balance at period end at Sep. 30, 2023 | 1,071,259 | $ 605 | 853,835 | 208,724 | 8,095
Balance at period start (in shares) at Mar. 31, 2023 |  | 61,030 |  |  |
Balance at period start at Mar. 31, 2023 | 887,993 | $ 610 | 842,062 | 37,203 | 8,118
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Issuance of common stock for employee stock purchase plan (in shares) |  | 27 |  |  |
Issuance of common stock for employee stock purchase plan | 726 |  | 726 |  |
Stock-based compensation (in shares) |  | 115 |  |  |
Stock-based compensation | 3,656 | $ 1 | 3,655 |  |
Purchase of common stock for retirement (in shares) |  | (128) |  |  |
Purchase of common stock for retirement | (3,066) | $ (1) | (464) | (2,601) |
Other comprehensive loss | (11) |  |  |  | (11)
Net loss (income) | 30,013 |  |  | 30,013 |
Balance at period end (in shares) at Jun. 30, 2023 |  | 61,044 |  |  |
Balance at period end at Jun. 30, 2023 | 919,311 | $ 610 | 845,979 | 64,615 | 8,107
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock-based compensation (in shares) |  | 7 |  |  |
Stock-based compensation | 2,874 | $ 3 | 2,871 |  |
Purchase of common stock for retirement (in shares) |  | (784) |  |  |
Purchase of common stock for retirement | (28,969) | $ (8) | (1,655) | (27,306) |
Exercise of stock options (in shares) |  | 251 |  |  |
Exercise of stock options | 6,640 |  | 6,640 |  |
Other comprehensive loss | (12) |  |  |  | (12)
Net loss (income) | 171,415 |  |  | 171,415 |
Balance at period end (in shares) at Sep. 30, 2023 |  | 60,518 |  |  |
Balance at period end at Sep. 30, 2023 | $ 1,071,259 | $ 605 | $ 853,835 | $ 208,724 | $ 8,095

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