Quarterly report pursuant to Section 13 or 15(d)

Stock Plans (Details)

v2.4.0.8
Stock Plans (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Total stock-based compensation expenses $ 60 $ 130 $ 386 $ 635
Research and Development Expense [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Total stock-based compensation expenses 28 52 173 356
General and Administrative Expense [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Total stock-based compensation expenses $ 32 $ 78 $ 213 $ 279