Property, Plant and Equipment Net (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Cost:
Property plant and equipment, cost	$ 56,920,926	$ 28,069,180
Less: Accumulated depreciation	(9,723,811)	(7,503,305)
Net book value	47,197,115	20,565,875
Buildings
Cost:
Property plant and equipment, cost	34,264,012	11,399,913
Office equipment
Cost:
Property plant and equipment, cost	415,007	383,797
Motor vehicles
Cost:
Property plant and equipment, cost	696,015	688,283
Machinery
Cost:
Property plant and equipment, cost	$ 21,545,892	$ 15,597,187

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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