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Common Shares (Summary Of The Status Of Unvested Stock Options) (Details) - $ / shares
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Unvested, Number of options, beginning of period (in shares) 246,250 738,750
Granted, Number of options (in shares)   175,000
Vested, Number of options (in shares)   (667,500)
Unvested, Number of options, end of period (in shares) 246,250 246,250
Unvested, Weighted average grant date fair value, beginning of period (in dollars per share) $ 0.22 $ 0.22
Unvested, Weighted average grant date fair value per option, end of period (in dollars per share) $ 0.22 $ 0.22
Employee, Directors and Consultants Stock Options [Member]    
Granted, Number of options (in shares) 0  
Weighted average remaining amortization period 3 years