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Stockholders' Equity (Details 4) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2015	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding	8,926,517		4,865,234
Number of Shares, Outstanding and vested			8,926,517
Warrant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Outstanding	1,785,303	8,628,911	973,046
Number of Shares, Granted	7,017,251	173,643	812,257
Number of Shares, Exercised		(2,040,278)
Number of Shares, Forfeited	(173,643)	(1,400,094)
Number of Shares, Outstanding and vested	8,628,911	5,362,183	1,785,303
Weighted Average Exercise Price Per Share, Outstanding	$ 2.70	$ 6.40	$ 2.41
Weighted Average Exercise Price Per Share, Granted	7.35	4.00	2.49
Weighted Average Exercise Price Per Share, Exercised		7.50
Weighted Average Exercise Price Per Share, Forfeited	4.00	7.50
Weighted Average Exercise Price Per Share, Outstanding and vested	$ 6.40	$ 5.60	$ 2.70

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Weighted average price at which option holders acquired shares when converting their warrant into shares.

+ References

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of warrant.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock warrant plan.

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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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Number of non-option equity instruments exercised by participants.

+ References

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 718



-SubTopic 10



-Section 50



-Paragraph 2



-Subparagraph (c)(1)(iv)(2)



-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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-Publisher FASB



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