SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Fair value of each share-based payment is estimated on the following assumptions
Risk-free interest rate	2.42%
Risk-free interest rate, minimum		2.69%
Risk-free interest rate, maximum		3.90%
Expected volatility	77.70%
Expected volatility, Minimum		72.06%
Expected volatility, Maximum		117.00%
Dividend yield
Expected term	5 years	5 years