Quarterly report pursuant to Section 13 or 15(d)

4. STOCKHOLDERS' EQUITY (Tables)

v3.3.0.814
4. STOCKHOLDERS' EQUITY (Tables)
 9 Months Ended
Sep. 30, 2015
Equity [Abstract]  
Schedule of assumptions used for equity compensation expense
  Three Months Ended   Nine Months Ended   Nine Months Ended
  September 30, 2015   September 30, 2015   September 30, 2014
Expected term 6.25 years   6.25 years   6.25 years
Volatility 51-54%   51-57%   63%
Dividend yield 0.0   0.0   0.0
Risk-free interest rate 1.75-2.14%   1.49-2.14%   2.22%
Schedule of stock options outstanding
    Nine Months Ended  
    September 30, 2015  
          Weighted  
          Average  
          Exercise  
    Shares     Price  
             
Outstanding at beginning of period     1,048,927     $ 7.24  
Exercised     (7,514 )   $ 6.25  
Forfeited     (9,710 )   $ 9.16  
Granted     312,500     $ 10.17  
Outstanding at end of period and expected to vest     1,344,203     $ 7.91  
Options exercisable     812,059     $ 7.11  
Stock-based compensation expense
    Three Months Ended     Nine Months Ended  
    September 30,     September 30,  
    2015     2014     2015     2014  
                         
Research and development   $ 184,302     $ 66,202     $ 514,107     $ 191,112  
Plasma centers     12,457       8,920       35,813       26,468  
General and administrative     251,173       251,938       671,742       703,814  
                                 
Total stock-based compensation expense   $ 447,932     $ 327,060     $ 1,221,662     $ 921,394