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v3.21.2

Shareholders Equity and Capital Stock (Details 2) - $ / shares | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Expected forfeiture rate | 6.10% | 6.20% |  |  | 5.60%
Expected life (years) | 3 years 10 months 24 days | 3 years 8 months 12 days |  | 3 years 8 months 12 days | 3 years 8 months 12 days
Expected volatility | 63.20% | 58.60% |  |  | 56.80%
Risk free rate | 0.40% | 1.60% |  |  | 1.00%
Expected dividend rate | 0.00% | 0.00% | 0.00% | 0.00% | 0.00%
Black-Scholes value (CAD$) | $ 0.30 | $ 0.35 |  |  | $ 0.31
Minimum [Member] |  |  |  |  |
Expected forfeiture rate |  |  | 5.80% | 5.30% |
Expected life (years) |  |  | 3 years 8 months 12 days |  |
Expected volatility |  |  | 53.80% | 56.00% |
Risk free rate |  |  | 1.90% | 1.00% |
Black-Scholes value (CAD$) |  |  | $ 0.33 | $ 0.32 |
Maximum [Member] |  |  |  |  |
Expected forfeiture rate |  |  | 6.00% | 6.00% |
Expected life (years) |  |  | 3 years 9 months 18 days |  |
Expected volatility |  |  | 55.00% | 57.50% |
Risk free rate |  |  | 2.10% | 1.60% |
Black-Scholes value (CAD$) |  |  | $ 0.39 | $ 0.44 |

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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 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 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)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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 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)(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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)(iv) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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