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Stock-Based Compensation (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Summary of stock-based compensation expense        
Total stock based compensation expense $ 54 $ 176 $ 224 $ 948
Remaining unrecognized expense of stock-based compensation 115   115  
Product Research and Development [Member]        
Summary of stock-based compensation expense        
Total stock based compensation expense 8 100 48 422
Sales and Marketing [Member]        
Summary of stock-based compensation expense        
Total stock based compensation expense 19 68 132 240
General and Administrative [Member]        
Summary of stock-based compensation expense        
Total stock based compensation expense $ 27 $ 8 $ 44 $ 286