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Stock-Based Awards (Tables) | 12 Months Ended
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Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of Unrecognized Stock-Based Compensation Expense and Average Remaining Vesting Period | A summary of unrecognized stock-based compensation expense and average remaining vesting period is as follows:
|  | Unrecognized Stock-Based Compensation |  |  | Average Remaining Vesting Period |
Employees and directors option awards |  | $ | 8 |  |  |  | 0.07 |
Employees and directors restricted stock awards |  | $ | 20,714 |  |  |  | 1.79 |
Summary of Option Activity | A summary of option activity is as follows:
|  | Options |  |  | Weighted- Average Exercise Price |
Outstanding January 1, 2014 |  |  | 7,844,691 |  |  | $ | 1.29 |
Granted |  |  | — |  |  |  | — |
Forfeitures/expirations |  |  | — |  |  |  | — |
Exercised |  |  | (2,514,621 | ) |  |  | 0.61 |
Outstanding at December 31, 2014 |  |  | 5,330,070 |  |  | $ | 1.61 |
Granted |  |  | — |  |  |  | — |
Forfeitures/expirations |  |  | — |  |  |  | — |
Exercised |  |  | (3,785,473 | ) |  |  | 1.19 |
Outstanding at December 31, 2015 |  |  | 1,544,597 |  |  | $ | 2.62 |
Granted |  |  | — |  |  |  | — |
Forfeitures/expirations |  |  | — |  |  |  | — |
Exercised |  |  | (176,350 | ) |  |  | 1.11 |
Outstanding at December 31, 2016(1) |  |  | 1,368,247 |  |  | $ | 2.82 |
(1) | Expire on dates ranging from March 4, 2017 to November 15, 2021.
Summary of Information on Stock Options Outstanding | The following table summarizes information on stock options outstanding at December 31, 2016:
|  | Options Outstanding |  |  | Options Exercisable |
Range of Exercise Prices |  | Shares |  |  | Weighted- Average Remaining Life (Years) |  |  | Weighted- Average Exercise Price |  |  | Shares |  |  | Weighted- Average Remaining Life (Years) |  |  | Weighted- Average Exercise Price |
$0.70 – $0.70 |  |  | 435,000 |  |  |  | 2.1 |  |  | $ | 0.70 |  |  |  | 435,000 |  |  |  | 2.1 |  |  | $ | 0.70 |
$1.07 – $1.07 |  |  | 93,535 |  |  |  | 1.0 |  |  |  | 1.07 |  |  |  | 93,535 |  |  |  | 1.0 |  |  |  | 1.07 |
$2.09 – $2.26 |  |  | 390,176 |  |  |  | 2.4 |  |  |  | 2.20 |  |  |  | 390,176 |  |  |  | 2.4 |  |  |  | 2.20 |
$5.05 – $5.05 |  |  | 285,000 |  |  |  | 4.1 |  |  |  | 5.05 |  |  |  | 247,500 |  |  |  | 4.1 |  |  |  | 5.05 |
$6.36 – $6.82 |  |  | 74,536 |  |  |  | 4.4 |  |  |  | 6.46 |  |  |  | 74,536 |  |  |  | 4.4 |  |  |  | 6.46 |
$7.01 – $8.51 |  |  | 90,000 |  |  |  | 4.7 |  |  |  | 7.48 |  |  |  | 90,000 |  |  |  | 4.7 |  |  |  | 7.48 |
|  |  | 1,368,247 |  |  |  | 2.8 |  |  | $ | 2.82 |  |  |  | 1,330,747 |  |  |  | 2.8 |  |  | $ | 2.76 |
Summary of Restricted Stock Activity | A summary of restricted stock activity is as follows:
|  | Shares |  |  | Weighted- Average Grant Date Fair Value |
Unvested Balance at January 1, 2014 |  |  | 1,896,877 |  |  | $ | 7.27 |
Granted |  |  | 623,088 |  |  |  | 16.08 |
Vested |  |  | (996,385 | ) |  |  | 6.73 |
Forfeited |  |  | (9,641 | ) |  |  | 10.81 |
Unvested Balance at December 31, 2014 |  |  | 1,513,939 |  |  | $ | 11.22 |
Granted |  |  | 886,413 |  |  |  | 19.72 |
Vested |  |  | (753,917 | ) |  |  | 10.05 |
Forfeited |  |  | (25,709 | ) |  |  | 17.30 |
Unvested Balance at December 31, 2015 |  |  | 1,620,726 |  |  | $ | 16.32 |
Granted |  |  | 1,687,553 |  |  |  | 11.19 |
Vested |  |  | (846,386 | ) |  |  | 13.98 |
Forfeited |  |  | (25,439 | ) |  |  | 16.17 |
Unvested Balance at December 31, 2016 |  |  | 2,436,454 |  |  | $ | 13.58 |

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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