Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum

NameShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRateMinimum
Namespacehttp://fasb.org/us-gaap/2020-01-31
Prefixus-gaap
Data typenum:percentItemType
Period typeduration
Substitution Groupxbrli:item
BalanceNone
NillableTrue
AbstractFalse

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TextLangRoleContainer role
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimumen-UShttp://www.xbrl.org/2003/role/labelhttp://www.xbrl.org/2003/role/link
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.en-UShttp://www.xbrl.org/2003/role/documentationhttp://www.xbrl.org/2003/role/link