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Note 10 - Stock-Based Compensation (Tables)
12 Months Ended
Dec. 31, 2014
Note 7 - Stock-Based Compensation Tables  
Summary of options issued, exercised and cancelled

A summary of options issued, exercised and cancelled for the years ended December 31, 2014 and 2013 are as follows:

 

    Shares     Weighted- Average Exercise Price ($)     Weighted- Average Remaining Contractual Term     Aggregate Intrinsic Value ($)  
Outstanding at December 31, 2012     7,384,618       0.34       8.30        
Granted     4,970,000       0.48       9.87        
Exercised     (110,092 )     0.35                
Cancelled     (3,928,568 )     0.35                
                                 
Outstanding at December 31, 2013     8,315,958     $ 0.42       9.09        
Granted     1,329,000       0.21       9.106        
Exercised                        
Cancelled     (2,834,192 )     0.46              
                                 
Outstanding at December 31, 2014     6,810,766     $ 0.26       8.11        
                                 
Exercisable at December 31, 2014     6,079,806     $ 0.36       8.37