CERTAIN RISKS AND CONCENTRATION - Additional Information (Detail)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Concentration Risk [Line Items]
Number of customers with greater than ten percent revenue			2	2
Number of customers with greater than ten percent of total accounts receivable			2		2
Customer 1
Concentration Risk [Line Items]
Concentration Risk, Percentage	36.10%	25.10%	32.90%	25.90%
Percentage of total accounts receivables			33.60%		48.50%
Customer 2
Concentration Risk [Line Items]
Concentration Risk, Percentage		11.70%	10.40%	11.10%
Percentage of total accounts receivables			11.80%		14.60%