Property, Plant and Equipment (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Schedule of property, plant and equipment
Property and equipment gross	$ 157,496,478	$ 155,132,570
Less accumulated depreciation and amortization	(34,896,581)	(32,741,114)
Property, plant, and equipment, net	122,599,897	122,391,456
Land use rights [Member]
Schedule of property, plant and equipment
Property and equipment gross	9,961,400	9,895,081
Building and improvements [Member]
Schedule of property, plant and equipment
Property and equipment gross	31,837,778	31,625,816
Machinery and equipment [Member]
Schedule of property, plant and equipment
Property and equipment gross	112,609,578	111,857,002
Vehicles [Member]
Schedule of property, plant and equipment
Property and equipment gross	441,949	439,007
Construction in progress [Member]
Schedule of property, plant and equipment
Property and equipment gross	$ 2,645,773	$ 1,315,664

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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