Condensed Consolidated Balance Sheet (Parenthetical) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 2,504,909	$ 1,230,561
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	63,437,629	63,390,744
Common stock, shares outstanding	53,565,449	54,088,188
Treasury stock at cost, shares	9,872,180	9,302,556