Quarterly report pursuant to Section 13 or 15(d)

4. STOCKHOLDERS' EQUITY (Details 2)

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4. STOCKHOLDERS' EQUITY (Details 2) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Stock-based compensation expense    
Total stock-based compensation expense $ 422,180 $ 387,069
Research and development    
Stock-based compensation expense    
Total stock-based compensation expense 156,556 164,068
Plasma centers    
Stock-based compensation expense    
Total stock-based compensation expense 13,010 11,033
General and administrative    
Stock-based compensation expense    
Total stock-based compensation expense $ 252,614 $ 211,968