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STOCK-BASED COMPENSATION (Details 2) (USD $)	12 Months Ended
STOCK-BASED COMPENSATION (Details 2) (USD $)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock option compensation expense for employees and non-employees
Total stock-based compensation expense	$ 1,177,683	$ 992,757	$ 1,254,503
Stock options
Stock option compensation expense for employees and non-employees
Total stock-based compensation expense	1,177,683	992,757	1,254,503
Stock options \| Research and development
Stock option compensation expense for employees and non-employees
Total stock-based compensation expense	423,925	325,208	361,773
Stock options \| General and administrative
Stock option compensation expense for employees and non-employees
Total stock-based compensation expense	$ 753,758	$ 667,549	$ 892,730

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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