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Shareholders' Equity and Capital Stock - Assumptions (Details)
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3 Months Ended | |
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Mar. 31, 2015
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Mar. 31, 2014
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| Shareholders' Equity and Capital Stock | ||
| Forfeiture rate (RSUs) | 7.81%urg_Share-BasedCompensationArrangementByShare-BasedPaymentAwardRestrictedShareUnitsFairValueAssumptionsForfeitureRate | |
| Expected option life (years) | 3 years 5 months 27 days | |
| Expected volatility | 66.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate | |
| Risk-free interest rate | 1.40%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate | |
| Expected dividend rate | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate | |
| Forfeiture rate (options) | 4.50%urg_Share-BasedCompensationArrangementByShare-BasedPaymentAwardFairValueAssumptionsForfeitureRate | |
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- Definition
The forfeiture rate assumption that is used in valuing an option on its own shares. No definition available.
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- Definition
The forfeiture rate assumption that is used in valuing restricted share units on its own shares. 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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