Quarterly report pursuant to Section 13 or 15(d)

Stock Plans (Details)

v2.4.0.6
Stock Plans (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Summary of share-based compensation expense recorded for awards under the stock option plans        
Total stock-based compensation expenses $ 316 $ 430 $ 1,868 $ 569
Research and development [Member]
       
Summary of share-based compensation expense recorded for awards under the stock option plans        
Total stock-based compensation expenses 114 103 730 159
General and administrative [Member]
       
Summary of share-based compensation expense recorded for awards under the stock option plans        
Total stock-based compensation expenses $ 202 $ 327 $ 1,138 $ 410