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Equity Transactions and Stock Incentive Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Summary of Stock Option Activity | The following table summarizes the Company’s stock option activity:
| Stock Options Outstanding |  | Weighted-Average Remaining Term (in years) |  | Weighted-Average Exercise Price |  | Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2020 | 3,126,521 |  |  | 6.1 |  | $ | 11.61 |  |  |
Granted | — |  |  |  |  | $ | — |  |  |
Exercised | (84,875) |  |  |  |  | $ | 3.88 |  |  |
Cancelled | (2,292) |  |  |  |  | $ | 13.50 |  |  |
Expired | (148,013) |  |  |  |  | $ | 26.61 |  |  |
Outstanding at December 31, 2020 | 2,891,341 |  |  | 5.5 |  | $ | 11.07 |  |  | $ | 25,520 |
Exercisable at December 31, 2020 | 2,854,813 |  |  | 5.5 |  | $ | 11.04 |  |  | $ | 25,286 |
Summary of RSU Activity | The following table summarizes the Company’s RSU activity:
| RSUs
| Shares |  | Weighted- Average Grant Date Fair Value |  | Total Fair Value of Shares Vested (in thousands)
Outstanding at January 1, 2018 | — |  |  |  |  |
Granted | 241,542 |  |  | $ | 29.09 |  |  |
Vested | — |  |  |  |  | $ | — |
Cancelled | (9,243) |  |  | $ | 28.72 |  |  |
Outstanding at December 31, 2018 | 232,299 |  |  | $ | 29.10 |  |  |
Granted | 564,805 |  |  | $ | 13.88 |  |  |
Vested | (103,224) |  |  | $ | 29.61 |  |  | $ | 1,596 |
Cancelled | (32,622) |  |  | $ | 20.77 |  |  |
Outstanding at December 31, 2019 | 661,258 |  |  | $ | 16.44 |  |  |
Granted | 624,415 |  |  | $ | 9.65 |  |  |
Vested | (308,222) |  |  | $ | 16.06 |  |  | $ | 3,336 |
Cancelled | (33,494) |  |  | $ | 16.58 |  |  |
Outstanding at December 31, 2020 | 943,957 |  |  | $ | 12.06 |  |  |
Summary of PSU Activity | The following table summarizes the Company’s PSU activity:
|  | PSUs
|  | Shares (1) |  | Weighted- Average Grant Date Fair Value |  | Total Fair Value of Shares Vested (in thousands)
Outstanding at January 1, 2018 |  | 62,791 |  |  | $ | 27.87 |  |  |
Granted |  | 108,957 |  | (2) | $ | 28.72 |  |  |
Vested |  | — |  |  |  |  | $ | — |
Cancelled |  | — |  |  |  |  |
Outstanding at December 31, 2018 |  | 171,748 |  |  | $ | 28.41 |  |  |
Granted |  | 204,580 |  |  | $ | 14.13 |  |  |
Vested |  | — |  |  |  |  | $ | — |
Cancelled |  | — |  |  |  |  |
Outstanding at December 31, 2019 |  | 376,328 |  |  | $ | 20.65 |  |  |
Granted |  | 404,880 |  |  | $ | 8.86 |  |  |
Vested |  | (5,254) |  |  | $ | 28.72 |  |  | $ | 47 |
Cancelled |  | (32,235) |  |  | $ | 28.72 |  |  |
Outstanding at December 31, 2020 |  | 743,719 |  |  | $ | 13.82 |  |  |
(1)The number of shares for the PSUs listed as outstanding at January 1, 2018 represents the actual number of PSUs granted to each recipient that are eligible to vest if the Company meets its performance goals for the applicable period. The number of shares listed as granted for PSUs granted after January 1, 2018 represents the “target” number of PSUs granted to each recipient eligible to vest if the Company meets its “target” performance goals for the applicable period. The actual number of PSUs eligible to vest for those PSUs will vary depending on whether or not the Company meets or exceeds the applicable threshold, target, or maximum performance goals for the PSUs, with 200% of the “target” number of PSUs eligible to vest at “maximum” performance levels. (2)During the first quarter of 2020, the Company’s financial results for the performance goals applicable to the PSUs granted in March 2018 were certified, which resulted in the reduction of the PSUs granted in 2018 to the number of PSUs eligible to vest from 108,957 to 76,722 shares (with the 32,235 share adjustment shown in the table above as “Cancelled”), 5,254 of which shares have since vested.
Summary of Share-based Compensation Costs by Award Type | The following table summarizes share-based compensation costs by award type:
| Year Ended December 31,
(In thousands) | 2020 |  | 2019 |  | 2018
Stock options | $ | 1,919 |  |  | $ | 4,850 |  |  | $ | 5,191 |
RSUs | 5,264 |  |  | 4,284 |  |  | 3,383 |
PSUs | 2,342 |  |  | 911 |  |  | 1,067 |
Total share-based compensation costs | $ | 9,525 |  |  | $ | 10,045 |  |  | $ | 9,641 |

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