Share-Based Compensation (Details) - Stock Options [Member] - $ / shares	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Weighted-average risk-free interest rates	2.50%	2.70%
Dividend yield	0.00%	0.00%
Weighted-average expected life of the option	7 years	7 years
Weighted-average expected stock price volatility	94.00%	94.00%
Weighted-average fair value of the options granted	$ .75	$ .36

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Weighted average expected volatility rate of share-based compensation awards.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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