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Stock Incentive Plans and Share-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Summary of Stock Option Activity | The following table summarizes the Company’s stock option activity during the three months ended March 31, 2017 and 2016:
|  | Number of Common Shares |  |  | Weighted- |
|  | Options |  |  |  |  |  |  | Available |  |  | Average |
|  | Outstanding |  |  | Exercisable |  |  | for Grant |  |  | Exercise Price |
2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2016 |  |  | 3,402,481 |  |  |  | 411,029 |  |  |  | 274,596 |  |  | $ | 9.02 |
Authorized |  |  | — |  |  |  |  |  |  |  | 889,259 |  |  |  | — |
Granted |  |  | 847,000 |  |  |  |  |  |  |  | (847,000 | ) |  |  | 13.36 |
Exercised |  |  | (19,989 | ) |  |  |  |  |  |  | — |  |  |  | 7.70 |
Cancelled |  |  | (16,459 | ) |  |  |  |  |  |  | 16,459 |  |  |  | 10.48 |
Balance at March 31, 2017 |  |  | 4,213,033 |  |  |  | 391,040 |  |  |  | 333,314 |  |  | $ | 9.90 |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at December 31, 2015 |  |  | 2,419,529 |  |  |  | 724,529 |  |  |  | 837,635 |  |  | $ | 8.16 |
Authorized |  |  | — |  |  |  |  |  |  |  | 874,709 |  |  |  | — |
Granted |  |  | 160,000 |  |  |  |  |  |  |  | (160,000 | ) |  |  | 10.53 |
Exercised |  |  | (159,626 | ) |  |  |  |  |  |  | — |  |  |  | 10.24 |
Balance at March 31, 2016 |  |  | 2,419,903 |  |  |  | 564,903 |  |  |  | 1,552,344 |  |  | $ | 8.49 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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