XML 29 R28.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock-based Compensation (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Stock- based compensation expense $ 131 $ 677 $ 1,350 $ 2,574
Research and development [Member]
       
Stock- based compensation expense 53 91 203 380
General and administrative [Member]
       
Stock- based compensation expense $ 78 $ 586 $ 1,147 $ 2,194