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Segment Reporting (Information on Reportable Segments, Plant and Equipment, Net) (Detail) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Plant and equipment, net	$ 16,140,827	$ 16,505,421
Zhengzhou Annec Industrial Co [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Plant and equipment, net	13,006,224	13,336,054
Beijing Annec [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Plant and equipment, net	$ 3,134,603	$ 3,169,367

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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