STOCKHOLDERS' EQUITY (Details)	Dec. 31, 2015 shares
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	5,050,279
Warrants to purchase common stock
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	1,428,383
Stock Option Plan
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	3,354,541
Employee Stock Purchase Plan
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	267,355