Fair Value of Financial Assets and Liabilities - Derivative Instruments (Valuation Assumptions for Warrants) (Details) - $ / shares	6 Months Ended	12 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Fair Value Assumptions and Methodology for Assets and Liabilities [Line Items]
Common stock closing price	$ 1.55
Series 2011 Warrants [Member]
Fair Value Assumptions and Methodology for Assets and Liabilities [Line Items]
Volatility	118.00%	112.00%
Expected term (years)	5 months 23 days	11 months 23 days
Risk-free interest rate	0.35%	0.64%
Dividend yield	0.00%	0.00%
Exercise price	$ 23.00	$ 23.00
Common stock closing price	$ 1.55	$ 3.98

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- Definition

Agreed upon price for the exchange of the underlying asset.

+ 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

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.

+ References

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- Definition

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

+ References

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- Definition

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

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- Definition

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

+ References

No definition available.

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