Quarterly report pursuant to Section 13 or 15(d)

14. Warrants (Tables)

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14. Warrants (Tables)
3 Months Ended
Mar. 31, 2014
Warrants Tables  
Common stock warrants

The following table summarizes information about common stock warrants outstanding at March 31, 2014:

 

Outstanding     Exercisable  
Exercise Price     Number Outstanding     Weighted Average Remaining Contractual Life (years)     Weighted Average Exercise Price     Number Exercisable     Weighted Average Exercise Price  
$ 3.30       11,364       2.12     $ 3.30       11,364     $ 3.30  
  1.25       13,950       1.50       1.25       13,950       1.25  
  1.00       24,000       2.57       1.00       24,000       1.00  
  0.75       4,240,271       4.19       0.75       4,240,271       0.75  
  0.50       587,750       4.53       0.50       587,750       0.50  
$ 0.50 - $3.30       4,877,335       4.21               4,877,335