Note 9 - Accrued Expenses
 12 Months Ended
Dec. 31, 2014
Payables and Accruals [Abstract]  
Accounts Payable and Accrued Liabilities Disclosure [Text Block]

9.

Accrued expenses


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


   

December 31,

 
   

2014

   

2013

 

Accrued personnel related costs

  $ 846     $ 1,063  

Accrued interest

    48       50  

Accrued research and development expenses

    1,279       713  

Other accrued expenses

    134       355  
    $ 2,307     $ 2,181