STOCKHOLDERS' EQUITY (Details) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	3,897	3,430
Warrants to purchase common stock
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	2,540	2,733
Stock Option Plan
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	1,057	697
Employee Stock Purchase Plan
Class of Stock [Line Items]
Common stock reserved for future issuance (in shares)	300	0