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Capital Stock (Details 2) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based Compensation $ 933 $ 943 $ 2,604 $ 2,596
Weighted Average Number Diluted Shares Outstanding Adjustment [Abstract]        
Basic 34,840,324 34,327,459 34,705,947 34,156,606
Weighted Average Number Diluted Shares Outstanding Adjustment 0 0 0 0
Diluted 34,840,324 34,327,459 34,705,947 34,156,606
Cost of Sales [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based Compensation $ 16 $ 17 $ 46 $ 44
Research and Development Expense [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based Compensation 36 31 102 80
Selling and Marketing Expense [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based Compensation 172 159 461 401
General and Administrative Expense [Member]        
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based Compensation $ 709 $ 736 $ 1,995 $ 2,071