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CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) (Parenthetical) (General and Administrative Expenses [Member], USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
General and Administrative Expenses [Member]
Allocation of Recognized Period Costs [Line Items]
Stock based compensation expense	$ 106,573	$ 112,198	$ 237,581	$ 344,963

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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