STOCKHOLDERS' EQUITY (Details)	Dec. 31, 2014
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	4,656,820
Warrants to purchase common stock
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	2,465,713
Stock Option Plan
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	1,891,107
Employee Stock Purchase Plan
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	300,000