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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of stock-based compensation expense
  Three months ended 
September 30,		  Nine months ended 
September 30,		 
  2016  2015  2016  2015 
Product research and development $8  $100  $48  $422 
Sales and marketing  19   68   132   240 
General and administrative  27   8   44   286 
Total stock-based compensation expense $54  $176  $224  $948 

 

  Remaining
unrecognized
expense at
September 30,
2016		 
Stock-based compensation $115 
Schedule of assumptions used in valuation of stock options
  For the nine months ended 
  September 30, 2016 
    
 Annual dividend yield  - 
 Expected life (years)  3.50 
 Risk-free interest rate  0.83%
 Expected volatility  65%
Stock options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Summary of all stock option plans / warrant activity

 

  Number of Options Outstanding  Weighted Average Exercise Price 
Outstanding at January 1, 2016  2,184,117  $4.48 
Granted  25,000   1.44 
Forfeited  (324,367)  4.57 
Outstanding at September 30, 2016  1,884,750  $4.43