CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Allowance for doubtful accounts	$ 651,000	$ 190,000
Par value of common stock (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares outstanding	49,900,795	49,528,214
Common stock, shares issued	50,562,176	49,940,548
Preferred stock, par value (in dollar per share)	$ 0.0001
Treasury stock	661,381	412,334
Preferred stock, shares authorized	1
Preferred stock, shares outstanding	1
Treasury Stock
Par value of common stock (in dollars per share)	$ 0.0001	$ 0.0001