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Capital Stock (Tables) | 12 Months Ended
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Dec. 31, 2019
Equity [Abstract] |
Summary of Stock Option Activity and Related Information | A summary of the Company’s stock option activity and related information for the years ended December 31, 2019, 2018, and 2017, are as follows:
| December 31, 2019 |  | December 31, 2018 |  | December 31, 2017
| Options (000’s) # |  | Weighted-Average Exercise Price $ |  | Options (000’s) # |  | Weighted-Average Exercise Price $ |  | Options (000’s) # |  | Weighted-Average Exercise Price $
Outstanding – beginning of year | 3,754 |  |  | 15.54 |  |  | 3,600 |  |  | 22.96 |  |  | 3,367 |  |  | 29.16 |
Granted | 2,525 |  |  | 3.98 |  |  | 1,052 |  |  | 8.67 |  |  | 732 |  |  | 10.18 |
Exercised | — |  |  | — |  |  | (2 | ) |  | 9.44 |  |  | (3 | ) |  | 9.44 |
Forfeited / expired | (308 | ) |  | 11.07 |  |  | (896 | ) |  | 37.44 |  |  | (496 | ) |  | 46.27 |
Outstanding – end of year | 5,971 |  |  | 10.88 |  |  | 3,754 |  |  | 15.54 |  |  | 3,600 |  |  | 22.96 |
Exercisable – end of year | 2,565 |  |  | 18.25 |  |  | 1,954 |  |  | 21.35 |  |  | 2,221 |  |  | 29.76 |
Non-Vested Stock Option Activity and Related Information | A summary of the Company’s non-vested stock option activity and related information for the years ended December 31, 2019, 2018 and 2017, are as follows:
| December 31, 2019 |  | December 31, 2018 |  | December 31, 2017
| Options (000’s) # |  | Weighted-Average Grant Date Fair Value $ |  | Options (000’s) # |  | Weighted-Average Grant Date Fair Value $ |  | Options (000’s) # |  | Weighted-Average Grant Date Fair Value $
Outstanding non-vested stock options – beginning of year | 1,800 |  |  | 4.25 |  |  | 1,379 |  |  | 4.44 |  |  | 1,096 |  |  | 4.30 |
Granted | 2,525 |  |  | 1.53 |  |  | 1,052 |  |  | 4.21 |  |  | 732 |  |  | 4.71 |
Vested | (807 | ) |  | 4.18 |  |  | (609 | ) |  | 4.65 |  |  | (399 | ) |  | 4.62 |
Forfeited | (111 | ) |  | 3.33 |  |  | (22 | ) |  | 3.93 |  |  | (50 | ) |  | 3.94 |
Outstanding non-vested stock options – end of year | 3,407 |  |  | 2.28 |  |  | 1,800 |  |  | 4.25 |  |  | 1,379 |  |  | 4.44 |
Details Regarding Outstanding and Exercisable Stock Options | Further details regarding the Company’s outstanding and exercisable stock options at December 31, 2019 are as follows:
| Outstanding Options |  | Exercisable Options
Range of Exercise Prices | Options (000’s) # |  | Weighted- Average Remaining Life (Years) |  | Weighted- Average Exercise Price $ |  | Options (000’s) # |  | Weighted- Average Remaining Life (Years) |  | Weighted- Average Exercise Price $
$0.00 – $4.99 | 2,496 |  |  | 9.2 |  | 3.98 |  |  | — |  |  | 0.0 |  | — |
$5.00 – $9.99 | 1,788 |  |  | 7.3 |  | 9.00 |  |  | 1,108 |  |  | 6.8 |  | 9.20 |
$10.00 – $19.99 | 693 |  |  | 7.2 |  | 10.18 |  |  | 462 |  |  | 7.2 |  | 10.18 |
$20.00 – $24.99 | 280 |  |  | 0.2 |  | 24.42 |  |  | 280 |  |  | 0.2 |  | 24.42 |
$25.00 – $29.99 | 348 |  |  | 2.2 |  | 27.69 |  |  | 349 |  |  | 2.2 |  | 27.69 |
$30.00 – $39.99 | 94 |  |  | 2.4 |  | 34.42 |  |  | 94 |  |  | 2.4 |  | 34.42 |
$40.00 – $49.99 | 257 |  |  | 5.2 |  | 43.99 |  |  | 257 |  |  | 5.2 |  | 43.99 |
$50.00 – $59.99 | 15 |  |  | 4.2 |  | 56.76 |  |  | 15 |  |  | 4.2 |  | 56.76 |
| 5,971 |  |  | 7.3 |  | 10.88 |  |  | 2,565 |  |  | 5.2 |  | 18.25 |

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