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Share Based Compensation (Tables)
9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock Based Compensation

All stock-based compensation is included in operating expenses for the periods as follows:

 

    Three Months Ended 
September 30,
    Nine Months Ended 
September 30,
 
Compensation cost recognized   2017     2016     2017     2016  
Selling, general and administrative   $ 84,538     $ 125,581     $ 261,696     $ 763,938  
Research and development     6,274       9,348       20,634       38,685  
    $ 90,812     $ 134,929     $ 282,330     $ 802,623  

Schedule of Stock Option Activity

Stock option activity under the 1998, 1999, 2001, 2003, 2006 and 2015 Stock Option Plans (collectively, the “Plans”) during the periods indicated below were as follows:

 

    Number of Shares Subject to Issuance     Weighted-
average Exercise
Price
    Weighted-
average Remaining Contractual 
Term
    Aggregate
Intrinsic Value
 
                         
Outstanding at December 31, 2016     1,665,420     $ 1.40       3.62 years     $ 2,414,446  
                                 
Granted     -       -                  
Forfeited or expired     (4,000 )     2.79                  
Exercised     (10,000 )     1.01                  
Outstanding at September 30, 2017     1,651,420     $ 1.40       2.87 years     $ 2,596,805  
Exercisable at September 30, 2017     1,314,327     $ 1.36       2.85 years     $ 2,100,076  

Schedule of Restricted Stock Units Outstanding

    Number of 
Shares
    Weighted
Average 
Grant Date
Fair Value
    Aggregate 
Intrinsic 
Value
 
                   
Outstanding at December 31, 2016     32,714     $ 1.89     $ 26,010  
Granted     17,493       2.97       -  
Vested and settled in Shares     (20,830 )     2.69       -  
                         
Outstanding at September 30, 2017     29,377     $ 2.04     $ 20,060