Stock-Based Compensation (Details 4) - USD ($)	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014
Equity-based compensation
Fair value of shares vested	$ 1,300,000
Weighted average fair market value of options granted (in dollars per share)	$ 3.59	$ 2.64
Weighted average assumptions
Expected life	6 years 1 month	5 years 11 months
Interest rate	1.56%	1.91%
Volatility	103.20%	70.30%
Time-based stock options
Equity-based compensation
Total unrecognized compensation cost	$ 4,500,000
Weighted-average period to recognize compensation cost (in years)	2 years 11 months
Performance based options \| Equity awards for non-employees issued for services
Equity-based compensation
Total unrecognized compensation cost	$ 0

Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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