Fair Value Measurements (Warrants) (Details)	12 Months Ended
Dec. 31, 2015
2006 Warrants
Valuation technique used to measure fair value of warrants
Expected volatility based on comparable public companies (as a percent)	86.00%
Remaining contractual term	3 months 18 days
2009/2010 Warrants
Valuation technique used to measure fair value of warrants
Expected volatility based on comparable public companies (as a percent)	75.00%
2009/2010 Warrants \| Minimum
Valuation technique used to measure fair value of warrants
Remaining contractual term	3 years 10 months 24 days
2009/2010 Warrants \| Maximum
Valuation technique used to measure fair value of warrants
Remaining contractual term	4 years 2 months 12 days

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.

No definition available.

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

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