COMMON AND PREFERRED STOCK (Tables)

12 Months Ended

Dec. 31, 2012

COMMON AND PREFERRED STOCK [Abstract]

Conversion of Convertible Preferred Stock

Upon the closing of the initial public offering, all outstanding Series-A1 and Series-A2 convertible redeemable preferred stock, and Series A3 convertible preferred stock were converted into a total of 21,840,128 shares of common stock, as shown in the table below.

	Conversion Shares
Series A-1 Convertible Redeemable Preferred Stock		16,439,480
Series A-2 Convertible Redeemable Preferred Stock		3,078,432
Series A-3 Convertible Preferred Stock		2,322,216
Total		21,840,128