Stock Options - Summary of Non-Vested Stock Options (Details) - $ / shares |
12 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||
| Shares Non-vested , Beginning balance | 3,329,989 | 3,826,274 |
| Shares, Granted | 2,378,500 | 1,681,500 |
| Shares, Vested | (1,643,772) | (2,003,806) |
| Shares, Forfeited | (438,428) | (173,979) |
| Shares Outstanding, Ending balance | 3,626,289 | 3,329,989 |
| Weighted Average Fair Value Non Vested, Beginning Balance | $ 4.61 | $ 2.86 |
| Weighted Average Fair Value, Granted | 5.63 | 6.22 |
| Weighted Average Fair Value, Vested | 3.98 | 2.60 |
| Weighted Average Fair Value, Forfeited | 5.91 | 5.03 |
| Weighted Average Fair Value Non Vested, Ending Balance | $ 5.32 | $ 4.61 |
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- References No definition available.
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of non-vested options outstanding. No definition available.
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- Definition Number of non-vested options forfeited. No definition available.
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- Definition Weighted average grant-date fair value of non-vested options forfeited. No definition available.
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- Definition Weighted average grant-date fair value of non-vested options outstanding. No definition available.
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- Definition Number of options vested. No definition available.
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- Definition Weighted average grant-date fair value of options vested. No definition available.
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