Note 7 - Prepaid Expenses
 12 Months Ended
Dec. 31, 2014
Prepaid Expenses And Other Assets [Abstract]  
Prepaid Expenses And Other Assets [Text Block]

7.     Prepaid expenses


Prepaid expenses as of December 31, 2014 and 2013 consisted of the following (in thousands):


   

December 31,

 
   

2014

   

2013

 

Prepaid insurance

  $ 280     $ 292  

Prepaid research and development expenses

    2,506       3,218  

Other prepaid expenses

    39       88  
    $ 2,825     $ 3,598  

As of December 31, 2014 and 2103, prepaid research and development expenses includes $2.5 million and $2.7 million, respectively for upfront fees paid to our primary clinical research organization assisting with our clinical trials. The upfront fees will be relieved in future periods based upon work completed.