Contributed surplus (Schedule of Weighted Average Assumptions) (Details) - Years |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Disclosure of terms and conditions of share-based payment arrangement [abstract] | ||
| Risk-free interest rate | 1.81% | 2.02% |
| Expected volatility | 64.00% | 77.00% |
| Expected life (years) | 4.2 | 4.2 |
| Forfeiture rate | 5.00% | 5.00% |
| X | ||||||||||
- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The option life of share options granted. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The forfeiture rate of the share price used to calculate the fair value of the share options granted. No definition available.
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