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Share Based Payments (Schedule of Outstanding Option Activity) (Details) | 12 Months Ended |  |  |
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Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2020 USD ($) $ / shares | Dec. 31, 2019 USD ($) $ / shares | Dec. 31, 2018 USD ($) $ / shares
Share Based Payments [abstract] |  |  |  |
Outstanding, Options at beginning of period | $ | 1,784,029 |  |  |
Exercised, options | $ | (211,626) |  |  |
Expired unexercised, options | $ | (517,833) |  |  |
Outstanding, Options, at end of period | $ | 1,054,570 |  |  |
Vested and exercisable, at end of period | $ |  | 1,054,570 | 1,459,779 |
Outstanding, options, Weighted average exercise price, beginning | $ / shares | $ 5.85 |  |  |
Exercised, options, Weighted average exercise price | $ / shares | 6.28 |  |  |
Expired unexercised, Weighted average exercise price | $ / shares | 4.79 |  |  |
Outstanding, options, Weighted average exercise price, ending | $ / shares | $ 6.28 |  |  |
Vested and exercisable, options, Weighted average exercise price | $ / shares |  | $ 6.28 | $ 5.77 |
Number Of Stocks And Weighted Average Exercise Price [abstract] |  |  |  |
Number of share options outstanding in share-based payment arrangement | $ | 1,054,570 | 1,054,570 | 1,784,029 | 1,784,029
Weighted average exercise price of share options outstanding in share-based payment arrangement | $ / shares | $ 6.28 | $ 6.28 | $ 5.85 | $ 5.85

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- Definition The number of share options outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_d&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_i&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -Subparagraph b -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_b_vi&doctype=Standard -URIDate 2020-01-01 + Details
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