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Note 7 - Accounts Payable and Accrued Expenses
9 Months Ended
Sep. 30, 2014
Payables and Accruals [Abstract]  
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
7.     Accounts payable and accrued expenses:

Accounts payable and accrued expenses consisted of the following:

   
December 31,
   
September 30,
 
   
2013
   
2014
 
                 
Trade payables
  $ 391     $ 511  
Employee compensation, benefits, and related accruals
    520       840  
Consulting and contracted research
    412       293  
Professional fees
    694       804  
Other
    266       373  
Total
  $ 2,283     $ 2,821