XML 37 R25.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 9 - Options and Warrants to Purchase Common Stock (Tables)
 3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Warrants or Rights [Table Text Block]
   
Shares Issuable
upon exercise of
          
   
upon Exercise of
    
Weighted Average
  
   
Outstanding Warrants
    
Exercise Price
  
                 
Outstanding at January 1, 2018
    
18,813,373
     $
0.14
  
Issued
    
---
      
--
  
Exercised
    
(500,000
)
   $
0.04
  
Forfeited
    
--
      
--
  
Outstanding at March 31, 2018
    
18,313,373
     $
0.14
  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
       
Warrants Outstanding and Exercisable
  
       
Shares Issuable
    
Weighted Average
          
       
upon Exercise of
    
Remaining
    
Weighted Average
  
Exercise Price
    
Outstanding Warrants
    
Contractual Life (years)
    
Exercise Price
  
$ 1.15      
461,340
      
3.1
     $
1.15
  
$ 0.25      
3,283,283
      
3.2
     $
0.25
  
$ 0.04      
3,568,750
      
4.5
     $
0.04
  
$ 0.10      
11,000,000
      
4.7
     $
0.10
  
         
18,313,373
      
4.4
     $
0.14
  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Dividend Yield
  
 
0%
 
Expected Life (in years)
  
2.90
–
2.92
Expected Volatility
  
163.19%
–
163.46%
Risk Free Interest Rate
  
 
2.38%
 
Share-based Compensation, Stock Options, Activity [Table Text Block]
   
Shares Issued
    
Weighted
  
   
Upon Exercise of
    
Average
  
   
Options
    
Exercise Price
  
                 
Outstanding at December 31, 2017
    
57,057,768
     $
0.36
  
Granted
    
3,000,000
     $
0.12
  
Exercised
    
--
      
--
  
Forfeited
    
(232,645
)
    
1.36
  
Outstanding at March 31, 2018
    
59,825,123
     $
0.35
  
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]
Options Outstanding
    
Options Exercisable
  
Number Outstanding
    
 
Weighted
Average
Remaining
Contractual
Life (years)
    
Weighted
Average
Exercise
Price
    
Number
Exercisable
    
Weighted
Average
Exercise
Price
  
                                   
34,475,000      
9.70
     $
0.06
      
22,808,336
     $
0.06
  
545,289      
9.73
     $
0.075
      
211,955
     $
0.075
  
3,000,000      
4.86
     $
0.12
      
249,999
     $
0.12
  
500,000      
3.38
     $
0.16
      
500,000
     $
0.16
  
81,395      
5.89
     $
0.21
      
81,395
     $
0.21
  
100,000      
2.47
     $
0.22
      
100,000
     $
0.22
  
1,066,155      
3.12
     $
0.24
      
1,066,155
     $
0.24
  
2,087,500      
4.54
     $
0.25
      
2,087,500
     $
0.25
  
35,595      
5.04
     $
0.27
      
35,595
     $
0.27
  
474,815      
6.11
     $
0.28
      
474,815
     $
0.28
  
234,506      
4.89
     $
0.285
      
234,506
     $
0.285
  
81,522      
2.81
     $
0.30
      
81,522
     $
0.30
  
200,000      
6.88
     $
0.66
      
200,000
     $
0.66
  
150,000      
6.86
     $
0.68
      
150,000
     $
0.68
  
7,233,277      
0.75
     $
0.70
      
7,233,277
     $
0.70
  
488,356      
7.13
     $
0.73
      
371,666
     $
0.73
  
3,104,653      
3.90
     $
0.83
      
3,104,653
     $
0.83
  
975,000      
6.20
     $
0.84
      
975,000
     $
0.84
  
300,000      
5.39
     $
1.10
      
300,000
     $
1.10
  
300,000      
5.24
     $
1.15
      
300,000
     $
1.15
  
115,000      
2.99
     $
1.35
      
115,000
     $
1.35
  
300,000      
4.15
     $
1.55
      
300,000
     $
1.55
  
3,077,060      
4.64
     $
1.66
      
3,077,060
     $
1.66
  
900,000      
3.39
     $
1.90
      
900,000
     $
1.90
  
59,825,123      
7.11
     $
0.35
      
44,958,434
     $
0.44