4. STOCKHOLDERS' EQUITY (Details 2) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock-based compensation expenses
Research and development	$ 55,067	$ 43,178	$ 162,643	$ 49,446
General and administrative	170,154	165,017	503,893	359,098
Total stock-based compensation expense	$ 225,221	$ 208,195	$ 666,536	$ 408,544