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Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2013
Reconciliation of Numerators and Denominators used in Computing Basic and Diluted Net Income Per Share

The following is a reconciliation of the numerators and denominators used in computing basic and diluted net income per share:

 

     Three Months Ended     Six Months Ended  
     June 30,
2013		     June 30,
2012		     June 30,
2013		     June 30,
2012		  

Net income (loss)

    $ (10,895,976 )    $ (15,590,350 )    $ (20,561,356 )    $ (21,072,148 ) 

Cumulative dividends on Series G Preferred Stock

      —         (5,000 )      —         (15,000 ) 
  

 

 

    

 

 

    

 

 

    

 

 

  

Numerator, basic and diluted net income (loss) available to stockholders

    $ (10,895,976 )    $ (15,595,350 )    $ (20,561,356 )    $ (21,087,148 ) 
  

 

 

    

 

 

    

 

 

    

 

 

  

Denominator:

         

Shares used in computation – basic:

         

Weighted average common shares outstanding

      79,345,030        73,234,692        78,350,236        73,199,914   
  

 

 

    

 

 

    

 

 

    

 

 

  

Shares used in computation – diluted:

         

Weighted average common shares outstanding

      79,345,030        73,234,692        78,350,236        73,199,914   

Dilutive effect of potential common shares outstanding

      —         —         —         —    
  

 

 

    

 

 

    

 

 

    

 

 

  

Shares used in computing diluted net income per share

      79,345,030        73,234,692        78,350,236        73,199,914   
  

 

 

    

 

 

    

 

 

    

 

 

  

Net income (loss) per share – basic

    $ (0.14 )    $ (0.21 )    $ (0.26 )    $ (0.29 ) 

Net income (loss) per share – diluted

    $ (0.14 )    $ (0.21 )    $ (0.26 )    $ (0.29 ) 
In Money Potential Common Shares [Member]
  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The potential common shares in the following tables represent potential common shares calculated using the treasury stock method from outstanding options, stock awards and warrants that were excluded from the calculation of diluted EPS:

 

     Three Months Ended      Six Months Ended  
     June 30,
2013		      June 30,
2012		      June 30,
2013		      June 30,
2012		  

Average market price during the period

    $ 3.14       $ 3.05       $ 3.19       $ 3.11   

In the money potential common shares from options excluded

      299,539        213,311        333,062        239,119  

In the money potential common shares from warrants excluded

      493,329        1,045,869        525,093        1,119,803  
Out of Money Potential Common Shares [Member]
  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Potential common shares from out-of-the-money options and warrants were also excluded from the computation of diluted EPS because calculation of the associated potential common shares has an anti-dilutive effect on EPS. The following table lists options and warrants that were excluded from diluted EPS:

 

     Three Months Ended      Six Months Ended  
     June 30,
2013		      June 30,
2012		      June 30,
2013		      June 30,
2012		  

Out of the money options and warrants excluded:

            

Stock options with an exercise price of $3.40 per share

      100,000        100,000         100,000        100,000  

Stock options with an exercise price of $3.43 per share

      40,000        —          40,000        —    

Stock options with an exercise price of $3.50 per share

      345,000        245,000        345,000        245,000  

Stock options with an exercise price of $3.51 per share

      959,500        984,670        959,500        984,670  

Stock options with an exercise price of $3.53 per share

      191,700        211,900        191,700        211,900  

Stock options with an exercise price of $3.90 per share

      20,000        —          20,000        —    

Stock options with an exercise price of $4.00 per share

      52,500        52,500        52,500        52,500  

Stock options with an exercise price of $5.00 per share

      100,000         300,000         100,000         300,000   

Stock options with an exercise price of $7.00 per share

      100,000         100,000         100,000         100,000   

Warrants with an exercise price of $3.60 per share

      1,562,500         1,562,500         1,562,500         1,562,500   

Warrants with an exercise price of $5.25 per share

      —          100,000         —          100,000   
  

 

 

     

 

 

     

 

 

     

 

 

  

Total anti-dilutive warrants and options excluded from EPS

      3,471,200         3,656,570         3,471,200         3,656,570   
Convertible Preferred Stock Excluded from EPS [Member]
  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

Potential common shares from outstanding Convertible Preferred Stock calculated on an if-converted basis having an anti-dilutive effect on diluted earnings per share were excluded from potential common shares as follows:

 

     Three Months Ended      Six Months Ended  
     June 30,
2013		      June 30,
2012		      June 30,
2013		      June 30,
2012		  

Potential common shares from Convertible Preferred Stock excluded from EPS

      32,400         346,400         32,400         346,400   
Unvested Restricted Stock Awards Excluded from EPS [Member]
  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The weighted average equivalent common shares relating to our unvested restricted stock awards that were excluded from potential common shares in the earning per share calculation due to having an anti-dilutive effect are:

 

     Three Months Ended      Six Months Ended  
     June 30,
2013		      June 30,
2012		      June 30,
2013		      June 30,
2012		  

Potential common shares from unvested restricted stock awards excluded from EPS

      512,928         467,164         509,236         463,234