PROPERTY, PLANT AND EQUIPMENT, NET - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 3,264,226	$ 1,895,512	$ 1,961,895
Property plant and equipment additions	$ 27,900,000