Stock-Based Compensation (Details 2)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Summary of assumptions used to value stock options granted to employees,directors and consultants
Annual dividend yield
Expected life (years)	3 years 6 months	2 years 11 months 19 days	3 years 6 months
Risk-free interest rate	0.83%
Expected volatility	65.46%
Minimum [Member]
Summary of assumptions used to value stock options granted to employees,directors and consultants
Risk-free interest rate		0.47%	0.28%
Expected volatility		60.07%	60.68%
Maximum [Member]
Summary of assumptions used to value stock options granted to employees,directors and consultants
Risk-free interest rate		1.41%	1.47%
Expected volatility		72.33%	108.75%

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

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

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- Definition

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

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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- Definition

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.

+ 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 (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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