XML 35 R23.htm IDEA: XBRL DOCUMENT v2.4.0.6
BUSINESS AND BASIS OF PRESENTATION (Details Narrative) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Dec. 31, 2011
Dec. 31, 2011
2011 Private Placement
Dec. 31, 2012
Securities purchase agreement, April 2011
Dec. 31, 2011
Securities purchase agreement, April 2011
Apr. 30, 2011
Securities purchase agreement, April 2011
Dec. 31, 2012
2012 Private Placement
Accumulated deficit $ 196,540 $ 183,587              
Aggregate principal amount of notes authorized under private placement               4,500  
Proceeds from convertible note financing, net of issuance costs           3,000 1,300    
Proceeds from unit financing, net of issuance costs         22,800        
Proceeds from common stock financing, net of issuance costs                 50,500
Cash and cash equivalents $ 45,722 $ 53,506 $ 13,444 $ 17,974