Stock-Based Compensation (Valuation Assumptions for Options) (Details) - Stock Options [Member]	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016
Expected term (years)		6 years
Dividend yield	0.00%	0.00%
Minimum [Member]
Risk-free interest rate	1.27%	1.22%
Volatility	117.00%	113.00%
Expected term (years)	2 years
Maximum [Member]
Risk-free interest rate	2.29%	1.63%
Volatility	144.00%	123.00%
Expected term (years)	9 years 7 months 6 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 (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&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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