Property, Plant and Equipment (Detail) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Property, Plant, and Equipment Disclosure [Line Items]
Land use rights	$ 9,886,149	$ 2,358,862
Building and improvements	17,874,450	11,145,342
Machinery and equipment	125,529,788	122,844,563
Vehicles	418,215	233,217
Construction in progress	4,263,022	2,335,579
Property, Plant and Equipment, Gross, Total	157,971,624	138,917,563
Less accumulated depreciation and amortization	(28,463,115)	(24,266,456)
Property, Plant and Equipment, net	$ 129,508,509	$ 114,651,107

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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