Condensed Consolidated Balance Sheet (Parenthetical) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 1,224,211	$ 2,685,497
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	62,522,859	61,851,709
Common stock, shares outstanding	52,793,498	52,830,842
Treasury stock at cost, shares	9,729,361	9,020,867