CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Allowance for doubtful accounts	$ 2,404,659	$ 991,990
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	38,712,896	32,797,625
Common stock, shares outstanding	38,712,896	32,797,625