No definition available.

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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

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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

+ Details

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- Definition

The estimated measure of the maximum 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

No definition available.

+ Details

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- Definition

The estimated measure of the minimum 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

No definition available.

+ Details

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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

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ 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=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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- Definition

Number of non-vested options outstanding.

+ References

No definition available.

+ Details

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Stock-Based Compensation - Assumptions (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Performance-based awards
Valuation of Stock Option Grants to Employees
Expected volatility, minimum			55.00%
Expected volatility, maximum			65.00%
Risk free interest rate, minimum			0.61%
Risk free interest rate, maximum			1.64%
Performance-based awards \| Minimum
Valuation of Stock Option Grants to Employees
Expected term (years)			5 years 3 months
Performance-based awards \| Maximum
Valuation of Stock Option Grants to Employees
Expected term (years)			7 years 3 months
Expected dividend yield			0.00%
Employee and non-employee stock options
Stock Based Compensation
Options granted (in shares)			457,000
Employee stock options
Valuation of Stock Option Grants to Employees
Expected volatility	61.96%
Expected volatility, minimum	54.18%	43.07%	49.94%	42.53%
Expected volatility, maximum		45.84%	61.96%	45.84%
Expected dividend yield	0.00%	0.00%	0.00%	0.00%
Risk free interest rate	0.65%
Risk free interest rate, minimum	0.31%	1.60%	0.31%	1.60%
Risk free interest rate, maximum		2.12%	1.70%	2.60%
Employee stock options \| Minimum
Valuation of Stock Option Grants to Employees
Expected term (years)	5 years 2 months 19 days	5 years 2 months 23 days	5 years 2 months 19 days	5 years 2 months 23 days
Employee stock options \| Maximum
Valuation of Stock Option Grants to Employees
Expected term (years)	10 years	10 years	10 years	10 years
Non-employee stock options
Stock Based Compensation
Options granted (in shares)			51,737
Options unvested (in shares)	7,814		7,814