Stock-Based Compensation (Valuation Assumptions for Options) (Details) - Stock Options [Member]	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Volatility		113.00%
Expected term (years)	6 years	6 years
Dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	2.10%	1.58%
Volatility	116.00%
Maximum [Member]
Risk-free interest rate	2.38%	1.63%
Volatility	118.00%
Expected term (years)	9 years 9 months 18 days

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).

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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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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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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