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Note 8 - Net Loss Per Share
6 Months Ended
Jun. 30, 2016
Notes to Financial Statements  
Earnings Per Share [Text Block]
8.     Net Loss P
er Share
 
The following table summarizes our calculation of net loss per common share for each of the periods presented (in thousands, except share and per share data):
 
 
 
Three Months Ended
June 30,
 
 
Six
Months Ended
June 30,
 
 
 
2016
 
 
2015
 
 
2016
 
 
2015
 
Net loss
  $ (978 )   $ (1,215 )   $ (1,799 )   $ (3,407 )
Weighted average shares outstanding—basic and diluted
    30,126,755       6,585,533       30,058,942       6,225,722  
Basic and diluted net loss per share
  $ (0.03 )   $ (0.18 )   $ (0.06 )   $ (0.55 )
 
The following outstanding potential common shares are not included in diluted net loss per share calculations as their effects would have been anti-dilutive:
 
 
 
Three Months Ended
June 30,
 
 
Six
Months Ended
June 30,
 
 
 
2016
 
 
2015
 
 
2016
 
 
2015
 
Employee and non-employee stock options
    3,163,600       5,287,736       3,163,600       5,287,736  
Estimated common shares issuable upon conversion of notes payable
    2,466,667       2,667,443       2,466,667       2,667,443  
Common shares issuable under common stock purchase warrants
    3,525,500       4,650,000       3,525,500       4,650,000