Stockholders' Equity (Details 3) (Warrant [Member], USD $)	6 Months Ended	12 Months Ended
Jul. 17, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Warrant [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Weighted average fair value per warrant	$ 5.03	$ 3.76	$ 5.84	$ 4.87
Risk-free interest rate	0.99%	2.47%	2.45%	1.18%
Expected lives	7 years 6 months	5 years	6 years	7 years
Expected volatility	36.98%	44.99%	37.49%	28.18%

Represents the weighted average fair value of the warrant.

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- Definition

Period the instrument, asset or liability is expected to be outstanding, 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 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ References

+ Details

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- Definition

Risk-free interest rate assumption used in valuing an instrument.

+ References

+ Details

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