v3.4.0.3
NOTE 6 - STOCKHOLDERS' EQUITY (Tables)
 3 Months Ended
Mar. 31, 2016
Stockholders' Equity Note [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] The following assumptions were used in determining the fair value of employee and vesting non-employee options during the three months ended March 31, 2016 and 2015:

   
March 31,
2016
   
March 31,
2015
 
Risk-free interest rate
   
1.54% - 1.73
%
   
1.68% - 1.94
%
Dividend yield
   
0
%
   
0
%
Stock price volatility
   
129.41%-130.97
%
   
140.67% -145.24
%
Expected life
 
5 – 9.2 years
   
7-10  years
 
Weighted average grant date fair value
 
$
1.07
   
$
5.50
 
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] The following table summarizes the stock option activity for the three months ended March 31, 2016:

   
Shares
   
Weighted-Average
Exercise Price
   
Weighted Average
Remaining
Contractual Term
   
Aggregate
Intrinsic Value
 
Outstanding at January 1, 2016
   
629,628
   
$
7.59
     
4.5
       
Granted
   
233,495
   
$
1.28
     
10.0
       
Canceled/expired
                             
Outstanding at March 31, 2016
   
863,123
   
$
5.89
     
5.76
   
$
272,554
 
                                 
Exercisable at March 31, 2016
   
758,979
   
$
5.89
     
5.3
   
$
265,654
 
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] The following table presents information related to stock options at March 31, 2016:

Options Outstanding
   
Options Exercisable
 
Exercise
    Price
   
Number of
Options
   
Weighted Average
Remaining Life
In Years
   
Exercisable
Number of
Options
 
$ 0.00-5.00       456,440       7.2       431,126  
  5.01-12.50       382,675       4.1       303,845  
  12.51-25.00       15,008       4.0       15,008  
  25.01-45.00       9,000       3.6       9,000  
          863,123       5.8       758,979  
Schedule of Outstanding Warrants [Table Text Block] The following table summarizes information with respect to outstanding warrants to purchase common stock of the Company, all of which were exercisable, at March 31, 2016:

Exercise
Price
   
Number
Outstanding
  Expiration Date
$ 1.25     $ 117,648  
March 2021
  4.75       482,500  
Sept/Oct 2020
  5.00       220,913  
August 2016
          821,061    
Schedule of Warrants Activity [Table Text Block] The following table summarizes the warrant activity for the three months ended March 31, 2016:

   
Shares
   
Weighted-Average
Exercise Price
   
Weighted-Average
Remaining
Contractual Term
   
Aggregate
Intrinsic
Value
 
Outstanding at January 1, 2016
   
703,413
   
$
4.83
     
3.5
       
Grants
   
117,648
   
$
1.25
     
5.0
       
Exercised
   
-
                       
Forfeitures or expirations
   
-
                       
Outstanding at March 31, 2016
   
821,061
   
$
4.32
     
3.5
   
$
136,472
 
                                 
Exercisable at March 31, 2016
   
821,061
   
$
4.32
     
3.5
   
$
136,472