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Goodwill and Intangible Assets (Details Textual) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Amortization of intangibles	$ 351,795	$ 390,171
Finite-Lived Intangible Assets, Remaining Amortization Period (in years)	5.8 years

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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