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Loss per common share
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Earnings Per Share [Abstract]    
Loss per common share
Loss per common share
All shares issuable for both periods were anti-dilutive because of the reported net loss. Basic and diluted loss per share for the three months ended March 31, 2014 and 2013, respectively, were as follows: 
 
Three Months Ended
 
March 31
2014
 
March 31
2013
Loss available to stockholders
$
(1,020,045
)
 
$
(860,393
)
 
 
 
 
Weighted average shares outstanding - Basic and diluted
14,796,413

 
13,212,894

Basic and diluted loss per share
$
(0.07
)
 
$
(0.07
)
 
 
 
 
Anti-dilutive shares underlying stock options outstanding
1,186,325

 
1,095,250

Anti-dilutive convertible debentures
555,556

 
75,806
Loss per common share:
Basic and diluted earnings per share for the years ended December 31, 2013 and 2012, respectively, were as follows: 
 
2013
 
2012
Loss available to stockholders
$
(3,449,489
)
 
$
(1,636,957
)
 
 
 
 
Weighted average shares outstanding - Basic and diluted
13,385,155

 
13,135,071

Basic and diluted loss per share
$
(0.26
)
 
$
(0.12
)
 
 
 
 
Anti-dilutive shares underlying stock options outstanding
1,148,000

 
1,096,500

Anti-dilutive convertible debentures
555,556

 
75,806