CONVERTIBLE SENIOR NOTE (Tables)

12 Months Ended

Dec. 31, 2012

CONVERTIBLE SENIOR NOTES [Abstract]

Carrying Amount of the Convertible Senior Note

	As of December 31,
	2011			2012
Principal		2,032,620			-
Debt discount		(1,303,579	)		-
Accumulated amortization of debt discount		471,852			-
Accrued interest		71,726			-
Carrying amount		1,272,619			-

Interest Expense

	For the years ended December 31,
	2010		2011		2012
Interest expense at coupon rate		474,278		193,220		26,730
Amortization of debt discount		585,627		294,543		36,297
Total interest expense recognized		1,059,905		487,763		63,027