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Note 7 - Loss Per Share
 3 Months Ended
Mar. 31, 2019
Notes to Financial Statements  
Earnings Per Share [Text Block]
NOTE
7
- LOSS PER SHARE
 
The following table presents the shares used in the basic and diluted loss per common share computations:
 
    Three Months Ended March 31,
    2019   2018
Numerator                
Net loss available in basic and diluted calculation   $
(3,293,184
 )   $
(1,760,022
 )
Comprehensive loss    
(3,293,184
 )    
(1,760,022
 )
Denominator:                
Weighted average common shares outstanding-basic    
15,731,517
      
11,383,217
  
                 
Effect of diluted stock options warrants and preferred stock (1)    
-  
      
-  
  
                 
Weighted average common shares outstanding-basic and diluted    
15,731,517
      
11,383,217
  
                 
Loss per common share-basic and diluted   $
(0.21
 )   $
(0.15
 )
 
(
1
) The number of shares underlying options and warrants outstanding as of
March 31, 2019
and
March 31, 2018
are
10,022,709
and
5,950,630,
respectively. The number of shares underlying the convertible debt as of
March 31, 2019
is
5,047,700.
The number of shares underlying the preferred stock as of
March 31, 2019
and
March 31, 2018
is
79,246.
The effect of the shares that would be issued upon exercise of such options, warrants, convertible debt and preferred stock has been excluded from the calculation of diluted loss per share because those shares are anti-dilutive.