Note 5 - Accrued Liabilities (Tables)
 12 Months Ended
Dec. 31, 2013
Payables and Accruals [Abstract]  
Schedule of Accrued Liabilities [Table Text Block]
   

December 31,

 
   

2013

   

2012

 
                 

Payroll, bonus, and benefits

  $ 141     $ 160  

Legal and consulting

    1,300       884  

Stock-based compensation

    71       67  

Other accrued expenses

    226       284  
    $ 1,738     $ 1,395