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Property and Equipment (Details Textual) (USD $)	12 Months Ended
Property and Equipment (Details Textual) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Property and Equipment (Textual)
Depreciation expense	$ 4,895,736	$ 3,707,270

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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