Property, Plant and Equipment Net (Detail) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Cost:
Property plant and equipment, cost	$ 57,946,910	$ 56,920,926
Less: Accumulated depreciation	(11,805,897)	(9,723,811)
Net book value	46,141,013	47,197,115
Construction of buildings
Cost:
Property plant and equipment, cost	34,856,273	34,264,012
Office equipment
Cost:
Property plant and equipment, cost	422,450	415,007
Motor vehicles
Cost:
Property plant and equipment, cost	749,870	696,015
Machinery
Cost:
Property plant and equipment, cost	$ 21,918,317	$ 21,545,892