Stockholders' Equity (Details 4) - $ / shares |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Mar. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] | |||
| Balance at beginning | 158,756 | 157,193 | 100,464 |
| Granted | 10,000 | 82,550 | 109,483 |
| Forfeited | (3,416) | (1,547) | |
| Vested | (77,571) | (51,207) | |
| Balance at ending | 158,756 | 157,193 | |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] | |||
| Balance at beginning | $ 14.1 | $ 15.6 | $ 16.8 |
| Granted | 14.1 | 18.9 | |
| Forfeited | 17.7 | 22.8 | |
| Vested | 15.9 | 17.4 | |
| Balance at ending | $ 14.1 | $ 15.6 | |
| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
- 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://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Number of non-vested options outstanding. No definition available.
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Number of non-vested options forfeited. No definition available.
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| X | ||||||||||
- Definition Weighted average grant-date fair value of non-vested options forfeited. No definition available.
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| X | ||||||||||
- Definition Weighted average grant-date fair value of non-vested options outstanding. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Number of options vested. No definition available.
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| X | ||||||||||
- Definition Weighted average grant-date fair value of options vested. No definition available.
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