XML 42 R31.htm IDEA: XBRL DOCUMENT v3.4.0.3
Note 14 - Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2016
Stockholders' Equity Note [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Following is a summary of the warrant activity for the three months ended March 31, 2016:

 
 
Number of
Warrants
   
Average
Exercise
Price
   
Weighted
Average
Remaining
Contractual
Term in Years
 
 
                 
Outstanding at January 1, 2016
   
2,050,001
     
2.74
     
4.82
 
Granted
   
-
     
-
     
-
 
Exercised / surrendered
   
-
     
-
     
-
 
Expired
   
-
     
-
     
-
 
Outstanding at March 31, 2016
   
2,050,001
     
2.74
     
4.56
 
Exercisable at March 31, 2016
   
2,050,001
     
2.74
     
4.56
 
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Table Text Block] The Company estimated the fair value of its warrants as of March 31, 2015 using the Binomial option pricing model using the following assumptions:

   
Series A Warrants
   
Series C Warrants
   
Placement Agent Warrants
   
Total
 
At March 31, 2015:
                       
Market price of common stock ($)
   
2.50
     
2.50
     
2.50
       
Number of shares of common stock underlying the warrants
   
660,030
     
310,478
     
92,404
     
1,062,912
 
Exercise price ($)
   
8.48
     
8.53
     
8.48
         
Remaining contractual life (years):
   
3.04
     
3.04
     
3.04
         
Dividend yield:
   
     
     
         
Expected volatility:
   
72
%
   
72
%
   
72
%
       
Risk-free interest rate:
   
0.89
%
   
0.89
%
   
0.89
%
       
Fair value ($)
   
306,150
     
143,182
     
43,042
     
492,374