SUBSEQUENT EVENTS (Details)			1 Months Ended		3 Months Ended	12 Months Ended
	Jan. 01, 2016 shares	Jan. 01, 2015 shares	Feb. 26, 2016 USD ($) ft²	Jan. 31, 2016 USD ($)	Jun. 30, 2015 shares	Dec. 31, 2015 shares
2014 Equity Incentive Plan
Subsequent Event [Line Items]
Increase to shares of common stock reserved for issuance		2,306,812			3,000,000	5,306,812
Subsequent Event
Subsequent Event [Line Items]
Cash lent for convertible promissory note | $				$ 1,500,000
Amount authorized under stock repurchase program | $			$ 10,000,000
Square feet of commercial office space in sublease | ft²			72,500
Subsequent Event | ESPP
Subsequent Event [Line Items]
Increase to shares of common stock reserved for issuance	1,000,000
Subsequent Event | 2014 Equity Incentive Plan
Subsequent Event [Line Items]
Increase to shares of common stock reserved for issuance	2,500,000