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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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Percentage of issued and outstanding Common Shares     10.00%  
Stock-based expense $ 181 $ 166 $ 427 $ 308
Stock Options [Member]        
Stock-based expense 12 3 24 5
Restricted Stock Units (RSUs) [Member]        
Stock-based expense $ 169 $ 163 $ 403 $ 303