Redeemable Convertible Preferred Stock, Convertible Preferred Stock, Common Stock and Warrants (Details) - $ / shares		12 Months Ended
Jul. 08, 2014	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Risk-free interest rate	1.60%	1.75%
Dividend yield	0.00%	0.00%
Expected volatility	101.60%	86.67%
Expected life of options, in years	4 years 10 months 24 days	4 years 4 months 10 days
Market price for common stock	$ 85.84	$ 13.47
Warrant exercise price, adjusted	$ 197.14	$ 13.32

Agreed upon price for the exchange of the underlying asset.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ References

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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.

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- Definition

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

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

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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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