Stock-Based Compensation (Details 1) - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Exercise price		$ 9.18
Dividend yield	0.00%	0.00%
Minimum [Member]
Stock price	$ 17.84	$ 6.81
Exercise price	$ 17.84	$ 6.81
Expected volatility	95.00%	97.00%
Risk-free interest rate	0.28%	1.71%
Expected life (in years)	5 years 3 months 8 days	5 years 6 months 29 days
Maximum [Member]
Stock price	$ 51.12	$ 8.65
Exercise price	$ 51.12	$ 8.65
Expected volatility	101.00%	97.00%
Risk-free interest rate	1.69%	2.37%
Expected life (in years)	6 years 29 days	6 years 7 days

Stock price.

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- Definition

Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

+ Details

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- Definition

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.

+ References

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- Definition

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

+ References

+ Details

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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=120381028&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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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