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Common Shares, Summary Of the Fair Value Of All Awards issued Under Stock Compensation Plans (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Percentage of issued and outstanding Common Shares     10.00%  
Stock-based expense $ 253 $ 168 $ 680 $ 476
Stock Options [Member]        
Stock-based expense 8 7 32 12
Restricted Stock Units (RSUs) [Member]        
Stock-based expense $ 245 $ 161 $ 648 $ 464