WARRANT - ADDITIONAL INFORMATION (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Jul. 24, 2015	Jun. 24, 2015	Dec. 31, 2010
Class Of Warrant Or Right [Line Items]
Warrant exercisable date			Jun. 30, 2020
Warrant exercise price (in dollars per share)					$ 1.732			$ 2.54
Change in fair value of preferred stock warrant	$ 0	$ 0	$ 0	$ 25,000
Series C Redeemable Convertible Preferred Stock
Class Of Warrant Or Right [Line Items]
Warrants issued to purchase shares (in shares)							87,500	87,500
Common Class B
Class Of Warrant Or Right [Line Items]
Warrants issued to purchase shares (in shares)							89,177
Total exercise price of warrants							$ 151,603
Warrant exercised issued, net (in shares)						76,565