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Note 9 - Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2014
Fair Value Disclosures [Abstract]  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
Assets  

Total

   

Quoted

Prices

in

Active

Markets

for

Identical

Assets

(Level 1)

   

Significant

Other

Observable

Inputs

(Level 2)

   

Significant

Unobservable

Inputs

(Level 3)

 

Money market mutual funds

  $ 26,355     $ 26,355     $     $  

Assets

 

Total

   

Quoted

Prices

in

Active

Markets

for

Identical

Assets

(Level 1)

   

Significant

Other

Observable

Inputs

(Level 2)

   

Significant

Unobservable

Inputs

(Level 3)

 

Money market mutual funds

  $ 26,353     $ 26,353     $     $