Fair Value of Financial Assets and Liabilities (Details 2)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Contractual life (in years)	2 months 1 day
Expected volatility	75.00%
Risk-free interest rate	2.45%
Significant unobservable inputs (Level 3) [Member]
Risk-free interest rate	1.59%	2.48%
Significant unobservable inputs (Level 3) [Member] \| Minimum [Member]
Contractual life (in years)	11 months 4 days	1 year 11 months 8 days
Expected volatility	74.00%	72.00%
Significant unobservable inputs (Level 3) [Member] \| Maximum [Member]
Contractual life (in years)	1 year 22 days	2 years 22 days
Expected volatility	100.00%	103.00%

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

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

+ References

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents 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
-Subparagraph (f)(2)(i)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.D.2)
-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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