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Common Shares (Summary Of The Status Of Unvested Stock Options) (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Unvested, Number of options, beginning of period (in shares) | 246,250 | 246,250 | 738,750 |
Granted, Number of options (in shares) | 50,000 |  | 175,000 |
Vested, Number of options (in shares) |  |  | (667,500) |
Unvested, Number of options, end of period (in shares) | 296,250 | 246,250 | 246,250 | 738,750
Unvested, Weighted average grant date fair value, beginning of period (in dollars per share) | $ 0.22 | $ 0.22 | $ 0.22 |
Granted, Weighted average grant-date fair value per option (in dollars per share) | 0.69 |  | 0.30 |
Vested, Weighted average grant-date fair value per option (in dollars per share) |  |  | 0.24 |
Unvested, Weighted average grant date fair value per option, end of period (in dollars per share) | $ 0.49 | $ 0.22 | $ 0.22 | $ 0.22
Employee, Directors and Consultants Stock Options [Member] |  |  |  |
Granted, Number of options (in shares) |  | 0 |  |
Weighted average remaining amortization period | 1 year 2 months 23 days |  |  | 4 years 11 months 27 days

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
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- Definition Non vested options at the beginning of the period that vest during the period. + References No definition available. + Details
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