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Note 9 - Loss Per Share
 6 Months Ended
Jun. 30, 2020
Notes to Financial Statements  
Earnings Per Share [Text Block]
NOTE
9
- LOSS PER SHARE
 
The following table presents the shares used in the basic and diluted loss per common share computations:
 
    Three Months Ended
June 30,		   Six Months Ended
June 30,
    2020   2019   2020   2019
Numerator:                                
Net loss attributable to common shareholders per common share: basic and diluted calculation   $
(3,577,378
 )   $
1,444,706
     $
(8,106,695
 )   $
(1,848,478
 )
                                 
Denominator:                                
Weighted average common shares outstanding-basic (1)    
9,838,152
      
2,960,937
      
7,362,240
      
2,274,754
  
Effect of diluted stock options, warrants, and preferred stock (2)    
 
      
3,046,141
      
 
      
 
  
Weighted average common shares outstanding - diluted    
9,838,152
      
6,007,078
      
7,362,240
      
2,274,754
  
Gain (loss) per common share-basic   $
(0.36
 )   $
0.49
     $
(1.10
 )   $
(0.81
 )
Gain (loss) per common share- diluted   $
(0.36
 )   $
0.24
     $
(1.10
 )   $
(0.81
 )
 
(
1
)		 Includes
1,390,166
contingently issuable shares related to prefunded warrants when outstanding during the
six
months ended
June 30, 2020
and
122,000
abeyance shares during the
six
months ended
June 30, 2020.
 
(
2
)		 The following is a summary of the number of underlying shares outstanding at the end of the respective periods that have been excluded from the diluted calculations because the effect on loss per common share would have been anti-dilutive:
 
    Six months ended
June 30,
    2020   2019
Options    
818,117
      
729,975
  
Warrants    
7,257,883
      
2,025,971
  
Convertible debt    
574,367
      
130,307
  
Preferred stock: series B    
79,246
      
79,246
  
Preferred stock: series D    
-
      
350,004
  
Preferred stock: series E    
-
      
1,484,634