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Common Shares (Unrecognized compensation) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2013
Employee, Directors and Consultants Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation expense related to stock options $ 39  
Weighted average compensation recognition period 1 year 2 months 23 days 4 years 11 months 27 days
Restricted Stock Units (RSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation expense related to unvested awards $ 582  
Weighted average compensation recognition period 1 year 4 months 24 days