Property, Plant and Equipment Net (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Cost:
Property plant and equipment, cost	$ 57,113,141	$ 56,920,926
Less: Accumulated depreciation	(10,693,490)	(9,723,811)
Net book value	46,419,651	47,197,115
Buildings
Cost:
Property plant and equipment, cost	34,354,744	34,264,012
Office equipment
Cost:
Property plant and equipment, cost	416,371	415,007
Motor vehicles
Cost:
Property plant and equipment, cost	739,081	696,015
Machinery
Cost:
Property plant and equipment, cost	$ 21,602,945	$ 21,545,892

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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