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Net Tangible Long Lived Assets by Principal Geographic Areas (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Long-Lived Assets by Geographical Areas [Line Items]
Net tangible long lived assets	$ 35,112,981	$ 36,469,878
United States
Long-Lived Assets by Geographical Areas [Line Items]
Net tangible long lived assets	33,792,325	34,565,770
Italy
Long-Lived Assets by Geographical Areas [Line Items]
Net tangible long lived assets	$ 1,320,656	$ 1,904,108

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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